Anyone use these heads. My son bought for a lake boat project. Oval port 305/119.This message has been edited. Last edited by: BP758,
Raceless in California!
March 01, 2024, 06:21 AM
Busted Knuckles
Speedmaster is the old ProComp. ProMaxx 290 is a copy of the AFR oval port. Google Weingardner's video analysis of both, they're night and day. VortecPro also has a video out of the problems with the chambers of the Speedmasters and issues with head gasket fitment.
Organized people are just too lazy to look for their $h!t.