the truck is a 78 swb with a th400 no stall and 342 gears im going to run air so i not going crazy with the cam the shortblock is 30 over with flat tops as for the machinist he goes pretty hard on every thing, he's done 3 sb's for me and all of them where great....i have to supply the heads so he's not trying to dump his junk on me haha....he's done this 366 head alot and he said he is very impressed with the result but my expirence with the 366 is in my old 3 tons more torque then ive ever seen but at 3k flat on there face maybe i should go ahead get them done and if i don't like them its not hard to swap them out
i hate doing things twice and then have useless set of heads hangin around