The only problem with the newer heads is that they have intergral intake manifold. From what I hear, they are very prone to cracking. Not to mention that you'd be stuck using that intake and couldn't go to an aftermarket one. John

'68 C-10 - 250 with Edelbrock 600cfm 4 barrel, Offy intake, Hedman headers and true duals, HEI, MSD 6A box, relocated gas tank
Soon to have: T-5 tranny