heads for 340

Yeah, at some point building stock heads, you meet a point of diminished returns. If the stock heads cost say 500-600 bucks to build (which is typical) then it really becomes uneconomical. I wouldn't put that much in 30 plus year old castings when I could turn around and have RHS heads for a little more coin.

But see, that's me. I can do a lot of my own head work at home. Clean, magnaflux, basic valve jobs, install and get spring height correct, so I can save myself some money on the front end. I plan on getting everything to do all head work eventually, but like everyone else, the economy has slowed me down.