application is for 4.125 bore, 3.750 stroke, blown alky sbc
not looking to go overboard on boost but looking for somewhere around 900 hp with bug catcher and 8-71 alky blower. These hrd pontiac heads really look nice and those hd rocker arms do too. Compression to be around 11-1 before boost. I had no idea about the flow ability of the hrd pontiac 23 degree heads compared to the 11x spread port brodix heads.