Having a hard time finding stainless valves for 317 heads. I know a lot of guys just run stockers but I would think some good stainless valves if not enconel exh would be better, I just don't see any listed anywhere and was curious if anyone had a part number. I am planning on stock size valves, dual springs, most likely 20psi max. Stock crank, howards rods w/ bolt upgrade, weisco pistons 9:1, hyd roller [email protected] .588 lift. 6.0L Going in a 71 chevelle street car with 4l80, yank converter, tran go etc. Turbos are hx35 7 blade compressor wheel for now until I get the car done. I may upgrade later. Air to air intercooler most likely on pump gas. Will most likely stay under 12-14 psi on pump gas.