1988 Chevy 350 Tbi swap to card

[matthewtibbetts]

How to swap your Tbi 350 to card

 

[DieselTech]

How to swap your Tbi 350 to card

Don't you got a thread on tbi to carb swap?

Unless I am missing something with card?

 

[matthewtibbetts]

Don't you got a thread on tbi to carb swap?

Unless I am missing something with card?

I do sorry I forgot about it

 

[DieselTech]

I do sorry I forgot about it

Just have a Moderator join your 2 threads together. Might get more exposure here.

 

[matthewtibbetts]

I don’t know what intake manifold to use

 

[DieselTech]

I don’t know what intake manifold to use

Well doesn't your 1988 use a standard spread bore intake manifold with a tbi adapter plate, bolted to the intake manifold.

If so, buy a a spread bore carb like the Q-jet or a spreadbore to square bore adapter plate & run a holley carb.

 

[Nad_Yvalhosert]

Well doesn't your 1988 use a standard spread bore intake manifold with a tbi adapter plate, bolted to the intake manifold.

If so, buy a a spread bore carb like the Q-jet or a spreadbore to square bore adapter plate & run a holley carb.

7.4 big block did, (at least they did through '91) but not the '87-'95 small blocks. They as well as the 4.3 had specific TBI manifolds with the 3 bolt flange.

 

[matthewtibbetts]

7.4 big block did, (at least they did through '91) but the '87-'95 small block had specific TBI manifolds with the 3 bolt flange.

So what does that mean for the process

 

[Nad_Yvalhosert]

So what does that mean for the process

Means you'll need to custom fab a 3-bolt TBI to (insert desired carb bolt pattern here) if you want to retain the TBI intake. You see, the inner 4 bolts (intake to heads) on '87-'95 are canted at 72° not 90° like the '86 and older.

Alternatively if you want an actual carburetor intake, you'll need additional machining for the bolt pattern angularity or a new/used set of heads from an '86 and older engine.

 

[matthewtibbetts]

Means you'll need to custom fab a 3-bolt TBI to (insert desired carb bolt pattern here) if you want to retain the TBI intake. You see, the inner 4 bolts (intake to heads) on '87-'95 are canted at 72° not 90° like the '86 and older.

Alternatively if you want an actual carburetor intake, you'll need additional machining for the bolt pattern angularity or a new/used set of heads from an '86 and older engine.

Ok so find 86 heads