Used and in great condition. $80 + shipping. Gave me no problems at all and I hope they will do the same for you.
I might have a use , but I won't be ready to measure what I need til I'm done building the new heads and can mock them up on another block I have. Ttt 4 ya...Jim
These have the 5/16ths ball and will work with 70+ style rockers and lifters. You can run later rockers and later lifters in an earlier engine with no issues, except that you should block off one oiling hole on the top of the block deck.