with all that has been said so far, would/could it be possible to buy a set of heads that had problems real cheap, and rebuild them to some what acceptable standards using quality springs, retainers, guides, and seats, and have something usable on the low end of hp/torque for a reasonable/lower cost than spending big money up front ?[compared to rebuilding a set of iron heads]. this is just a rhetorical question. i'm guessing it would not be possible [unless a guy could do all the work necessary himself], but i'm asking because i will be needing heads in the future and pennies will be counted very closely. i understand also, a good,used pair of heads would be the way to go, but would still need disassembled and checked. just throwing this out there and hope not throwing the discussion way off track.