TBI adapter plate Question
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Junior Member
Joined: Jan 2008
Posts: 28
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From: SE Mo
Car: Toyota FJ 40
Engine: 350 Chevy
Transmission: SM420
Axle/Gears: 3.70
TBI adapter plate Question
Hey there. When using a 4bbl manifold on a TBI swap into an older vehicle, is there a preferance on which TBI adapter plate to use? I've found aluminum plates from Holley and Tran-Dapt, along with a steel plate from Trans-Dapt. I got a 3/4" X 6.5" X6.5" piece of alum, thought about making my own, can't be that much to it. Thanks, Al
Supreme Member
Joined: Nov 2008
Posts: 1,545
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From: South Carolina
Car: 85 2M6, 87 'Bird 88 'burb
Engine: LX9, LG4, L05
Transmission: F23, 700r4, 700R4
Axle/Gears: 3.63, 2.73, 4.10
Re: TBI adapter plate Question
if it's a Q-jet manifold, you can get the 454 adapter from a junkyard. it's a pretty cool looking piece, but it'll add about 1 1/2 inches to you intake, maybe 2.
Supreme Member
Joined: Jan 2001
Posts: 1,047
Likes: 2
From: Lincoln, Nebraska
Car: 1988 Firebird, 2000 GTP
Engine: 327
Transmission: 700R4
Axle/Gears: 9" posi, 4.11
Re: TBI adapter plate Question
I made my own, but I ended up with the throttle body about 1/4" farther forward than stock. I figured this might help a bit more since the blades seem to direct the mixture more towards the rear of the engine. I ended up needing to cut the clamp off the throttle cable under the dash so it would extend far enough for the linkage.
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evilstuie
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Jan 9, 2020 08:29 PM
