parks450

iTrader: (17)

ok im doing a swap and found a set of 772 casting heads. the guy tells me there off the new aluminum block 5.3L engines. there cathedral port with D-shaped valves ports. he says there small chambered and has been selling them to a shop in texas and they have had better results with these than the 243 corvette heads.he says there better than the 243 heads stock and have had great results when they cnc them. i guess what im asking is does anybody have any info on these, what they come on etc. it just soudns alittle sketchy to me. these are brand new heads.