Dug them out. I actually have two singles, not a pair, but they could easily be matched up. They are both supposedly uncut and never ported, and that is the way they look. I think one is a 1.60" exh valve and the other is a 1.74". One is bare, and it looks like my machinist has cleaned it up, and then it sat and got surface rusty. Everything I have is always stored inside, but not always conditioned space. We actually had four, and rebuilt to make one good pair, but never found anything wrong with the other two as I recall. Dug out my paperwork too, and I would need $200 for either one, plus shipping. If that price does'nt scare you off, I'll measure the valves to be sure, and throw some pix up so you can see what shape they are in. If you want I'll look for the date codes, and see if you can make a closer match to what you have. Thx, Lefty71