CLASS RACER FORUM - View Single Post - 427-425hp w/GM 401 heads

dahkahuna · 12-07-2012, 01:32 AM

Is there a horsepower penalty on the 396=375hp aluminum head engine if you use the original # 842 aluminum casting cylinder head or is the factored hp # for the 401 only ?

12-07-2012, 01:32 AM	#2
dahkahuna Member Join Date: Jul 2006 Location: san dimas , calif Posts: 128 Likes: 0 Liked 5 Times in 3 Posts	Re: 427-425hp w/GM 401 heads Is there a horsepower penalty on the 396=375hp aluminum head engine if you use the original # 842 aluminum casting cylinder head or is the factored hp # for the 401 only ?