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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


Cool


Edited by 67 Marlin - Apr/13/2019 at 2:27pm
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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
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.



Edited by 67 Marlin - Apr/13/2019 at 2:28pm
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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
The ACDelco distributor has been rebuilt and looks like new. The advance curve is linear and puts in 26 degrees which concludes at 4800 RPM. The car runs best with 10 degrees of initial advance. The factory mechanical advance was 28 degrees concluding at 4400 RPM, and there was zero initial factory advance. I went with ACDelco Professional stuff for the cap, rotors, and plug wires. 

I was happy to see the gear's in great shape, which means the matching cam gear is probably also in good shape. The motor will be rebuilt next summer, so I wanted to have the distributor done before then.





Edited by 67 Marlin - Apr/13/2019 at 2:40pm
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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. They won't be able to support a fatter tire like the type on the car now, so smoking them into vapor should be even easier, assuming I would ever do such a thing, which of course would be utter nonsense LOL


The Marlin's factory wheels were black, but three of them were missing when I bought it. The Marlin had two 14x6 rally wheels on the front (which it continues to do) and was missing the spare. So, I found a pair that were originally on a 1967 Marlin and completed a set of four. Those ones were Matador Red, my Marlin's color, so the wheels were looking for a proper home. 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.


Edited by 67 Marlin - Apr/13/2019 at 3:49pm
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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 motor will be rebuilt this winter, so this is some groundwork. The power difference is noticeable;it's great to know the stock 343 motor has some guts left in it.


Went with Hooker Competition headers and the fit is fantastic. The transmission fill tube needed modification, which was expected. The RobbMc mini-starter was essential and also turns the motor over a lot quicker than the old one did. The only hiccup was the oil filler tube broke; the new APD one fit perfectly.

The exhaust is aluminized mandrel-bent 2.5-inch tubing back to the mufflers and 2.25-inch after. The shop's installation is a work of art - the tail pipes follow the 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 idle's a lot quieter than the Magnaflow knock-offs inherited from the PO. But, off idle and you can hear the atmosphere being sucked into the motor, and it sounds like Dukes of Hazzard when revved up! The log manifolds will go into a box.

The transmission mod worked well. The performance shop specializes in transmissions and this wasn't the first AM 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 a quarter tighter than the TSM spec; the shifts are crisp. The transmission was rebuilt the summer before I bought the car (I've put nearly all of its 1,300 miles on it), so you couldn't ask for a better transmission. Come next summer, the rebuilt motor's going to love it.


Edited by 67 Marlin - Apr/13/2019 at 3:47pm
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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.



Edited by 67 Marlin - Apr/13/2019 at 4:40pm
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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. Some may recognize these as 290 casting numbers. That's because the earliest 343s had 290 heads that were machined for the 343's bigger valves. Lightweight 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 went with a custom 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. 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 a Group 19 add-on for the 290 and 343 motors, which I've learned adds about 15 HP. 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.
  • 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 original Carter will go in a box for safe keeping.
  • Pistons - I'll order custom 4032 pistons from RaceTec. The cylinders will be bored .030 over and the pistons will be at the deck. I'll be aiming for 9.2 compression ratio to run 91 octane.
  • Rods - Molnar.
  • Ignition - Stock Delco unit that's already been rebuilt and curved.
  • Exhaust - Hooker Competition 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.
  • 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).
  • 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 - Apr/13/2019 at 4:49pm
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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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