New Engine Thoughts
04-05-2010, 03:56 PM
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Car: 1989 Pontiac Formula 350
Engine: 350 tpi
Transmission: 700
Axle/Gears: 3.27
New Engine Thoughts
My 1989 Formula 350 engine is about to be toast. I can purchase a L31 vortec engine outof a 99 Suburban that the bottom end needs a little work for a couple hundred bucks.
I also can purchase a vortec/tpi intake and a ZZ4 cam.
My questions are if I will need to get the 062 cast heads worked on to work with the ZZ4 cam or would I be better off keeping them as is and reusing my L98 cam?
Also with my setup being a MAF car would I need a prom change with the change of a cam? Would the present prom be fine with just the vortec heads?
Forgot to point out I plan on keeping the TPI in all scenarios.
Thanks
I also can purchase a vortec/tpi intake and a ZZ4 cam.
My questions are if I will need to get the 062 cast heads worked on to work with the ZZ4 cam or would I be better off keeping them as is and reusing my L98 cam?
Also with my setup being a MAF car would I need a prom change with the change of a cam? Would the present prom be fine with just the vortec heads?
Forgot to point out I plan on keeping the TPI in all scenarios.
Thanks
Last edited by megtom2; 04-05-2010 at 05:45 PM.
04-05-2010, 08:03 PM
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Car: 92 Firebird
Engine: Supercharged 6.0
Transmission: T56
Axle/Gears: 8.8 3.73
Re: New Engine Thoughts
Use your L98 heads and cam then its a direct swap. Compression is comparable and the internals are updated
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