C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Hi Can you install the l98 engine air manifold on the engine for 305 tbi

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Old 01-06-2018, 02:25 PM
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KAKA90
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Default Hi Can you install the l98 engine air manifold on the engine for 305 tbi

I install it on the engine l03 305 tbi caprice
Can I install it without having to change the tpi head

Old 01-06-2018, 02:29 PM
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KAKA90
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Originally Posted by KAKA90
I install it on the engine l03 305 tbi caprice
Can I install it without having to change the tpi head

I want to buy a manifold but you got more than a number for the same piece is there among them
I want to install it on the 305 TBI engine

https://www.ebay.com/itm/1989-1991-C...AAAOSwOgdYreOC
https://www.ebay.com/itm/162807902829
https://www.ebay.com/itm/GM-TPI-L98-....c100005.m1851

What is the difference between them I want to install on the TBI 305 engine
​​​​​​​my car caprice 1990
Old 01-06-2018, 02:40 PM
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KAKA90
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Originally Posted by KAKA90
I install it on the engine l03 305 tbi caprice
Can I install it without having to change the tpi head

upup
Old 01-06-2018, 04:36 PM
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Kevova
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You may need to modify center two bolt holes on intake manifold to bolt it on. Make a jumper to run additional 6 injectors, a different fuel pump, & then get a chip to make it run. I would find a 305 z28 or firebird for intake, wiring harness,& ecm. I'm sure you can find more information on impala forums.
Old 01-06-2018, 04:53 PM
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KAKA90
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Originally Posted by Kevova
You may need to modify center two bolt holes on intake manifold to bolt it on. Make a jumper to run additional 6 injectors, a different fuel pump, & then get a chip to make it run. I would find a 305 z28 or firebird for intake, wiring harness,& ecm. I'm sure you can find more information on impala forums.
Did you mean that you should use the L98 tpi head
Old 01-06-2018, 05:25 PM
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Kevova
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They did a bolt angle change at crossover center two holes on each side. The 305 uses the 45 degree center bolt holes. Idk for sure the l98 supposedly does not have the revised bolt holes. You can tell by looking at manifold if all holes are the same angle or not. If the angles don't match your heads, you will need to modify or change heads.

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