I'm a little slow, but it just hit me. 632, hurt without heads. You bought Fred's motor( from NY). If so, you gotta good deal. I thought about buying it myself. He had Ross pistons, but they're for 14* Big Chief heads not bb2's. You want be able to use them with the iron heads above.
Still a good buy if you have to get a set of pistons. And you can sell those to any of the NOS guys.