Trouble with those camel hmp heads is.........could be 300 hp or up th 375 hp engine.......my Vette was a 64 with injection,had these heads and rated 375 hp,,for old technology, they were great heads and flowed great...202 valves helped with the breathing.Don't think you can go too wrong with those heads, altho I would put in screw in studs for longer life.