gearheadmartin
09-02-2008, 05:46 PM
Im looking for info on factory sbc heads that would make the best power on my 400
sds10racer
09-02-2008, 07:29 PM
depending on what you would call factory. production heads, i would say vortec style and drill the steam holes for the street. otherwise, go to the gm performance catologue and drool over the offerings there.