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Discussion Starter · #1 ·
Hey Everyone,

Quick question here before I start pulling parts:

Will cylinder heads from a 3.8L N/A Grand Prix work work in my 3.8L Firebird?

The supply of GP's in the Junkyard is much higher than Firebirds, and will be 10 time easier to pull than a F-Body.
 

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Discussion Starter · #3 ·
I use car-part quite often, their interchange is a little spotty. I was burned by them on a few electronic parts. mechanical parts worked out just find on interchanges though. Thats a good sign though, I'll do some more searching and post my findings.
 

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Discussion Starter · #4 ·
I was able to get 2 heads off a 2003 Buick Lesabre. The parts interchange at the yard says that it will fit 95-02 Firebird. I found a head-less Grand Prix at the yard, and placed one on it, and everything seemed to line up good. Now I can focus on tearing it down and upgrading the parts. Heres my plan:

1) Tear down the heads and send them to a shop to be cleaned.

2) Port and Polish the Heads

3) Install Upgrades:

130lb Springs

Intense Push Rods

Retainers

1.90 Rocker Arms

Missing anything?
 
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