I got a price from Arrimgton on a complete 6.1 stroker using Manley rotating assy, Arrington rocker gear( super nice) a drag pack intake, and a little deal they make that mounts the coil packs on the intake. Cost for this fully machined and assembled motor was under 14k, and would be less with a shortblock core if one had one.

So i gotta believe if Arrington can use good parts and build a complete motor for that kind of money with a trick cam, rocker gear, good internals, arp hardware and a drag pack intake somebody could do it themselves for a good bit less than that. If you consider the cost to build a 650 horse well built motor of any type, i didnt think it was all that bad. I am probabaly going to have 6-7000 in a 360 i am gonna do that might make 500 horse