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Originally Posted by lilhomy10
can anyone tell me what the hp is on a base rebuilt pontiac 6.6l 400cid engine. from what ive gathered it seems to be around 325 but i cant get a definitive answer anyone with experiance id appreciate an answer. also could usre some sugg on the most cost effective (cheap) way to get it up to about 375hp.
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What year 400 is it ? What heads are on it ? Most had the #6X heads . Is the cam stock . If the cam was changed what cam or size cam is in it ? Is it a stock Q Jet manifold and carb set up . A real good stock rebuild on a T/A 6.6 Engine might make 280/300 HP .