Thanks they are the 6272292 casting number, actually I am buying a 396 from my brother that has these heads on it.
The casting number on the block is 3999290, it comes out to either a 402 or a 396.
It's a virgin block the rod and mains are std. but I cant get to it yet to check the numbers on the pad.
I will post them when I get them .
Thanks T.C.