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thunderzy
10-14-2007, 08:08 PM
how similar is the olds 455 to the pontiac 455?

esc1
10-14-2007, 09:47 PM
Completely different.

thunderzy
10-15-2007, 05:36 AM
Thanks. thats all i needed to know.

MonzaRacer
10-17-2007, 06:18 PM
Same cubes, bolt to same trans, fit in similar cars with prerequisite mount/hardware change.
BUT other than carbs, distributor caps, maybe Alternators and possibly plug wires if they are long enough, oh and I amn sure with same type carb you could possibly getthe air cleaners to swap too.
In my opinion though the Ponch is a much better engine as it can make scads of bottom end torque and not have to buy big heads or such.
Good Luck