http://www.manleyperformance.com/dl/cat/cylinder_head_components.pdf
Double w/ damper 1.550”, 250 @ 1.850”, 680 @ 1.150
These were at work and they are tossing them. There are six good ones. I haven't a clue why anyone here would have them, but they were never near an engine.
Free if used at the GRM challenge.
PM me otherwise