GM 4.3 V6 conversion - Page 5 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 12-26-2004, 02:07 PM   #41
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Originally Posted by matt95ssei
The 4.3 is not an overobred 3.8. In fact it has a larger bore/stroke, and the heads are different along with coolant passages.
The 4.3 is actually a 350 with 2 cylinders cut off. It has the same 4.0" bore and 3.48" stroke as the old small block 350. Because of this, there are a lot of performance parts that transfer over (inlcuding a lot of internal parts like rods, pistons, etc.)

If you are REALLY interested in a engine swap, look at the new GP GXP motor. It is the 5.3 truck motor, rated at 295HP and 315 lb/ft, and should be cheaper than a Northstar transplant.
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Old 12-26-2004, 05:47 PM   #42
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wow, that will kill the Bonnie GXP.
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