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My 1967 Marlin Thread

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67 Marlin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67 Marlin Quote  Post ReplyReply Direct Link To This Post Posted: Apr/18/2018 at 11:34pm
Originally posted by Ollie Ollie wrote:

Thinking back to the first day you unloaded your "new" car.....I know you have enjoyed the AMC journey !!

Having AMC Fun,
Ollie


Yes sir! If everything goes according to plan this summer, it'll be even "newer" and I'll be enjoying it even more.

Edited by 67 Marlin - Oct/26/2018 at 9:57pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67 Marlin Quote  Post ReplyReply Direct Link To This Post Posted: May/20/2018 at 6:46pm
Luck strikes again! Found another quarter panel extension molding. It's not NOS like the driver side one, but comparatively it's much better than the one on the car. The nasty dings are obvious, but if you look at the molding below the lowest ding, you might be able to tell that it's almost completely flattened. Finding these two pieces is some good fortune. Had the car three years now and I find them both within a month of each other.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67 Marlin Quote  Post ReplyReply Direct Link To This Post Posted: Jun/01/2018 at 10:10pm
Check out this sweet piece of ignition! The original ACDelco distributor has been rebuilt by Baldwin Performance Carburetor. I was happy to see the gear's in great shape. When the time comes to rebuild the motor, I'm assuming the cam gear shouldn't be any worse. I went with ACDelco Professional stuff for the cap, rotors, and plug wires. 

The custom advance curve is linear and designed for 10 to 12 degrees of initial advance (factory initial advance was zero). The factory mechanical advance was 28 degrees in at 4,400 RPM. The custom curve is 26 degrees in at 4,800 RPM. Along with the 10 degrees of initial advance, my curve generally has 7 degrees of advance beyond the factory setting throughout the entire curve and concludes 400 RPM later. This was a good tuneup, the car runs smoother and has more get up and go than ever. I'll have to be careful not to stretch out the timing chain any more than it probably already is after 51 years and 106K on the odometer.





Edited by 67 Marlin - Oct/01/2018 at 7:34pm
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Post Options Post Options   Thanks (1) Thanks(1)   Quote WARBED Quote  Post ReplyReply Direct Link To This Post Posted: Jun/05/2018 at 12:44am
Not sure what year AMC went to a nylon Cam gear but best to change it if it is. Mine went at 80k, bent my valves in the process. it was at highway speeds and since it was a 72 AMX with coil induction the flames coming out of the coil and over the windshield was a shocking surprise.
72 Matador 360/727/390 posi sold     78 Pacer 401/727/331 posi sold       59 American 2dr S/W 2.5 Jeep 700R4 never sell.      1950 Kelvinator ice cold  &nb
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67 Marlin Quote  Post ReplyReply Direct Link To This Post Posted: Aug/17/2018 at 2:22pm
Had the 14x5.5 factory steel wheels blasted and powder coated satin black. The later model rally wheels are on the car now, but figure at some point I might go to a car show and easily swap the correct ones on. Plus, with skinnier tires, it'll be even easier to vaporize rubber than with the 245/60 15s on the back now Big smile


The Marlin's factory wheels were black. I was missing missing three of them when I bought the car. It had two 14x6 rally wheels on the front (which it continues to do) and was missing the spare. So, I found some original 1967 ones from a vendor and completed a set of four. They were off a Marlin, too, so heck, talk about Even Steven. Those ones were Matador Red, my Marlin's color. Looks like AMC painted some of the steel wheels black and some of them body color.

I still needed a spare, so I bought a 14x6 rally from a Forum member. I had that put in black, too. The wheels on the car aren't black, but at some point I might have them re-powdered to a different color; this way the spare tire wheel can be black and not worry about matching the wheels on the car if they change.


Edited by 67 Marlin - Oct/01/2018 at 7:36pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67 Marlin Quote  Post ReplyReply Direct Link To This Post Posted: Oct/12/2018 at 6:02pm
The Marlin's been enhanced with a new exhaust system and transmission mods. The difference in power and performance exceeded my expectations. The motor will be rebuilt this winter, so this is some groundwork. But, it's great to know the stock 343 motor has some guts left in it.


Went with long-tube Hooker headers because they're the only ones that fit the square port heads. The fit is fantastic; my only concern was ground clearance and that's no problem. The transmission fill tube needed to be modified, which was expected. The RobbMc mini-starter was essential. The mini-starter turns the motor over a lot quicker than the old one did; that's a sweet bonus. The only hiccup was the oil filler tube broke. Not a problem; the new APD one fit perfectly.

The exhaust is mandrel-bent aluminized 2.5-inch tubing back to the mufflers and 2.25-inch after. The installation is a work of art. The tail pipes follow the lower quarter panel lines, the hardware's cleaned up so there's no ugly distractions, and the tips are angle cut. The mufflers are Walker Dynomax Super Turbo. The sound is incredible. The idle's a lot quieter than the Magnaflow knock-offs inherited from the previous owner. But, off idle and you can hear the atmosphere being sucked into the motor, and it sounds like Dukes of Hazzard when revved up! This car sounds souped up; I can't wait to hear what it sounds like after the rebuild. Power is noticeably greater across the RPM spectrum - holy shickenjanski do AMC motors like to breath! I guestimate this resulted in 20-25 HP and 25-30 TQ over the log manifolds, which'll go into a box for originality's sake (and the grubby old starter, too).

The transmission mod has also contributed to the fun factor. This is the best performing and shifting automatic I've owned. The performance shop specializes in transmissions and this wasn't the first AM Borg-Warner gear they've encountered. They rebuilt and finned the torque converter for street performance duty and it's about a 1700 stall (compared to 1100-1200 factory). No high-stall worries or overheating the transmission on the highway and I get better street performance and driveability. What's not to love? They adjusted the front and rear bands of the M-11 a quarter tighter than the TSM spec; the shifts are crisp. The transmission was rebuilt in 2014, the summer before I bought the car; I've put nearly all of its 1,300 miles on it. The guys said it looked pristine in there.

The headers will come off to be ceramic coated prior to the motor going back in sometime in the spring. Then, I'll see where the shift points will be with the new motor; no point adjusting now when the vacuum's going to be different. I have 19 inches of vacuum now. When the time comes, I'll see what I need to do with the modulator valve to ensure the motor can rev to where I (and the new valvetrain) want it to.



Edited by 67 Marlin - Nov/11/2018 at 12:31pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67 Marlin Quote  Post ReplyReply Direct Link To This Post Posted: Oct/26/2018 at 10:37pm
The Marlin's motor is out, so I'm cleaning up the engine bay while I can. It's amazing how nice simple stuff like old brake line retainer screws can look when you clean off 52 years of exposure to atmosphere. The whole engine bay's going to be looking just as spiffy and shiny soon enough, not that's it's all too grimy. But, I want it looking fantastic for when the motor goes back in with new copper paint.



Edited by 67 Marlin - Oct/26/2018 at 11:04pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67 Marlin Quote  Post ReplyReply Direct Link To This Post Posted: Oct/27/2018 at 12:33am
Here's what's in store for the motor...
  • Heads - 3178453 units that jcisworthy turned into a masterpiece. These were 290 casting numbers, but some 1967 343 heads also had these numbers; unusual numbers for an unusual fastback. 2.055" and 1.650" Ferrea 8mm valves, PAC beehive springs, positive valve seals, and porting and valve job wizardry that John oriented for the street. The exhaust crossovers were blocked to keep cool.
  • Cam - Mike Jones. Told him my first priority is to get from zero to 60 ASAP. And, secondly, to rev the motor through 5000 RPMs as quickly as I want. The motor's oversquare, the valvetrain's been lightened, and I'm using high-quality parts; I want a side order of revving to go with my torque! Mike recommended a 202/208 split duration cam. The intake profile is for a Chrysler 440 motor home; that's torque! The exhaust gives it a bit more RPM range. With the Scorpion 1.7 ratio rockers, the final lift will be .521 intake and .508 exhaust. He said peak HP will be about 5100 RPM and should hold for a couple hundred RPM and then nose over. The LSA is 111. Hylift Johnson lifters will go with the cam.
  • Intake - A modified 1968 390 intake. The 1968 and 1969 390 intake was made available for the 290 and 343 motors through the Group 19 program. I've learned these manifolds make 15 extra HP when bolted onto the 290s and 343s. So, I've got even more power coming with casting numbers that can be considered correct. Who needs aluminum? I turned the four holes into a split plenum and lowered the resulting center diver down a little. Also radiused the ceiling edges under the carb to help with flow.
  • Carb - Edelbrock AVS2 650. I've always been a Carter AFB guy, but almost went with Holly. But, a few folks who can't stand Edelbrocks tried the AVS2 with the annular boosters and told me they perform as well as any Holly they've ever used. Do they? Heck if I know, but I'm going to find out. The Carter will go in a box for safe keeping.
  • Pistons - I'll order custom AutoTec 4032 pistons from RaceTec. The AutoTec pistons were designed to support 600 HP. I'll be thrilled if I achieve 2/3 of that, but regardless I need custom pistons and RaceTec will make them in any compression height and valve relief. The cylinders will be bored .030 over and the pistons will be at the deck. I'll be aiming for 9.0 to 9.2 compression ratio to run 91 octane.
  • Rods - Molnar.
  • Ignition - Stock Delco unit that's already been rebuilt and curved.
  • Exhaust - Hooder headers with 2.5-inch tubing to the Walker Dynomax Super Turbo mufflers, and 2.25-inch tubing out the back. Check a few posts back for more info about this. It made a noticeable difference on a 52-year old stock motor. I can't wait to see the end product when the motor's done.
  • Other Stuff - Bulltear timing cover, oil pump kit with the hydro-relief grooves, and oil pump adapter that SC397 detailed for me (Rick also detailed the double-roller timing set's cam sprocket), and a connector so I can use a Motorcraft oil filter. A bunch of other good stuff.
  • Oiling Mods - More like oiling cleanup and verification. I asked them to drill the oil feed passages to the mains all the way through, check to see the front cam bearing isn't restricting oiling to the distributor gear, chamfer the cam bearing holes in the block and all holes intended to return oil to the pan, eliminate casting flash in the lifter gallery and smooth out anything rough enough to impede oil return, and use shorter block pipe plugs behind the timing set.


Edited by 67 Marlin - Oct/27/2018 at 6:18pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WARBED Quote  Post ReplyReply Direct Link To This Post Posted: Oct/27/2018 at 3:15pm
I all ways said the main oil journals were never drilled all the way through. Also the cam journal hole is not what needs to be chamfered it's the cam bearing feed hole in the cam bearing itself on the side facing the block, inline with the oil gallery going to the mains. if it's not chamfered then it restricts oil to the mains. cool build 
72 Matador 360/727/390 posi sold     78 Pacer 401/727/331 posi sold       59 American 2dr S/W 2.5 Jeep 700R4 never sell.      1950 Kelvinator ice cold  &nb
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ruby loye Quote  Post ReplyReply Direct Link To This Post Posted: Oct/27/2018 at 3:54pm
Those skinny Costco bias ply do smoke a bit, especially with a 327 and positive rear!
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