I bought some nice ported C heads and a .30 over 455 for $250 didnt really have the extra cash to spend since my daily driver is in the shop but I couldnt pass the deal up. The only thing they said was it dosnt have transmission mounts on the block cause he used a chevy 400 with an adapter plate. Can a bop 400 still be used with it? The block has block offs so the oil stays in the bottom and it has arp main bolts. Now i just cant wait to put these heads on my motor I have now and see how much of a difference it makes from the ported j heads i have on there now. He said the heads also have comp cam magnum roller rockers and guide plate and are good to 6500rpm. Now I can get a bigger cam and see what this bad boy can do.