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Old 04-23-2017, 11:13 AM
yossarian19 yossarian19 is offline
258 I6
 
Join Date: Nov 13, 2016
Location: Grass Valley, CA
Posts: 362
AMC 4 barrel to TBI plate?

I have a 401 that is going to get 454 TBI slapped on it. Right now I'm on a four barrel intake with a Holley spread bore TBI adapter. If you are up on carbs, you already see the problem: the 4350 spread bore that AMC used is *not* the same spread bore that the Holley adapter was made for.
So, what's the solution here?
It looks like a die grinder might fix my problem.
Would a 2-barrel AMC intake work?
Edelbrock Performer intake?
Some other adapter that is designed for the AMC intake?
I got the Holley adapter free (birthday present) not realizing that "spread bore" wasn't sufficiently detailed. I don't want to spend $300 making a $60 part work, though.
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Old 04-23-2017, 11:41 AM
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TexasJ10 TexasJ10 is offline
360 AMC
 
Join Date: Jan 03, 2002
Location: Houston, Texas
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Hamilton has good options for tbi adapters

http://hamiltonfuelinjection.com/cat...-adapters.aspx
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  #3  
Old 04-23-2017, 12:07 PM
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babywag babywag is offline
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Location: Land of froot loops and cukcoo-nuts, CA
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Get a hold of a square bore intake, I don't believe anyone makes an adapter for the amc motorcraft 4350 4bbl intake.
Plenty of used intakes out there if you don't want to pay for new.
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  #4  
Old 04-23-2017, 08:32 PM
yossarian19 yossarian19 is offline
258 I6
 
Join Date: Nov 13, 2016
Location: Grass Valley, CA
Posts: 362
Hah! It looked like there was no way it would fit, with 1/4" or so of intake manifold showing under the adapter plate.
The 454 TBI unit can open all the way with no interference, though, so it'll run.
I'm going to use a die grinder to smooth the transition from adapter to intake manifold to minimize the harm there and eventually I'm going to buy an aluminum intake manifold - but it'd work with *zero* mods.
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  #5  
Old 04-24-2017, 04:45 PM
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Blinkinlights Blinkinlights is offline
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Join Date: Sep 19, 2004
Location: Edmonton, AB Canada
Posts: 407
Transdapt 2199 will go from AMC/Ford spreadbore to Holley square bore.
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  #6  
Old 04-26-2017, 07:29 AM
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Woodchomper Woodchomper is offline
350 Buick
 
Join Date: Dec 17, 2002
Location: Saint Charles, Missouri
Posts: 920
Whatever adapter you end up using make sure the TBI unit fits properly. The newer 454 TBI have a larger base. Check out the pictures in the link below:

https://www.thirdgen.org/forums/tbi/...-using-gm.html
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  #7  
Old 05-07-2017, 11:16 AM
Bill USN-1 Bill USN-1 is offline
258 I6
 
Join Date: Nov 11, 2006
Location: Oak Harbor, Wa
Posts: 353
http://www.binderplanet.com/forums/i...utions.105992/
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Hamilton Fuel Injection
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  #8  
Old 05-07-2017, 07:31 PM
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Mr. Wilson Mr. Wilson is offline
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Join Date: Feb 23, 2016
Location: Oswego KS
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I got mine from Bill at binder planet. I put it directly onto the spread bore intake in the 76 and put the TBI straight onto the adapter. I drove it to and from work today, about 75 miles. It works great and if you tell him spread bore he'll send the correct gasket. I would call Bill at binder planet, his adapter is top notch. Heck it looks like it's aircraft grade.
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