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Doug's 70 AMX Build |
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DoughertyAMX
Supporter of TheAMCForum Joined: Sep/20/2016 Location: Washington, Ind Status: Offline Points: 519 |
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Interesting on the 4300s. I actually don't have a carb yet that's why contemplating how to go. Have the stock steel intake and an R4B.
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scott
AMC Addicted Joined: Jul/10/2007 Location: Wildwood Pa. Status: Offline Points: 3502 |
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If you don't have a 4300 carb I see no problem going with one of the aftermarket offerings, especially if the engine is not going to be stock. I don't have any opinions on an aftermarket carb, I haven't found a Holley or Edelbrock that agreed with me. If you did have a 4300, I would say it is well worth the price of a kit to rebuild it & see how you like it.
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DoughertyAMX
Supporter of TheAMCForum Joined: Sep/20/2016 Location: Washington, Ind Status: Offline Points: 519 |
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Thought I'd post a few more pics I took this week to show the progress............or lack of progress lol
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DoughertyAMX
Supporter of TheAMCForum Joined: Sep/20/2016 Location: Washington, Ind Status: Offline Points: 519 |
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Short block together. Just about time to make some decisions on intake and carb. Think I like the R4B and would leave it aluminum cast color, but the Ram Air fit issue scares me.............
Still torn between 4300 Motorcraft as they came, or a Quick Fuel 670 vac sec/elec choke.........don't have either one but need to decide soon. Leaning towards free flow exhaust manifolds, if I can find a good set. Decisions decisions
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DoughertyAMX
Supporter of TheAMCForum Joined: Sep/20/2016 Location: Washington, Ind Status: Offline Points: 519 |
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DoughertyAMX
Supporter of TheAMCForum Joined: Sep/20/2016 Location: Washington, Ind Status: Offline Points: 519 |
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Sent my water pump off to waterpumpman.................hoping to get it back soon
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amcglass
AMC Addicted Joined: Dec/11/2011 Location: NW Ohio Status: Offline Points: 2588 |
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keep the updates coming
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Javmanpres
BBG Mark Donohue 401 74 Jav/AMX 71 Matador 2dr sedan delivery wagon 1902 Rambler Runabout 70 T/A Javelin |
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Ram Air Rick
Supporter of TheAMCForum Joined: Jul/04/2007 Location: United States Status: Offline Points: 2668 |
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I'm a believer in the Autolite 4300's. Many don't think they're good carbs, but my experience is different, and I've had good luck with them. My experience is with the stock intake manifolds though. With your current intake selection, I think I'd consider an aftermarket carb.. I noticed new free flow exhaust manifolds for sale on ebay. Good luck... Rich C.
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DoughertyAMX
Supporter of TheAMCForum Joined: Sep/20/2016 Location: Washington, Ind Status: Offline Points: 519 |
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Does anyone have the height spec on the Autolite 4300, mounting surface to air horn (ac mounting) vs a Holley 4150 series? You know where I'm going............the ram air concern using an R4B. I have read and read and read differing opinions on whether an R4B will work with a 70 Ram Air Hood. I am leaning towards taking a shot at using the R4B, no spacer, and a 670 Quick Fuel, then cut down the ram air seal. Many say that works fine, others say they still hit............
Just hate to put that 53 pound intake slug on such a nice motor. I know the 532c intake is a nice flowing intake for a cast/stock intake, just heavy. Heck, I'm not even sure my engine stand will hold the motor up if I install it! An R4B still makes it 1970 correct even if using a non Autolite carb makes it non correct. My other concern with using the R4B is the heat riser tube coming off the ac housing. Assume most who use the R4B and Ram Air just remove it? Not needed if you run electric choke anyway. Pretty much decided NOT to use a 4300 carb, now just trying to decide on the intake to use. The cast stock intake and go away with no worries about hood clearance, or make the R4B work.
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Ram Air Rick
Supporter of TheAMCForum Joined: Jul/04/2007 Location: United States Status: Offline Points: 2668 |
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"Does anyone have the height spec on the Autolite 4300, mounting surface to air horn....." Don't forget, since it looks like you'll be using this dimension, to gauge the height differences, and how that would compare to the stock configuration for hood clearance, add the 4300 spacer height as well. Rich C. |
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