I just bought a 72 351c block and it came with crank, cam, rods and pistons, the rods have a casting number C8OE-A AQ51 and the pistons have a 351c cast in them, everything I researched says those are 302 rods and I don't know why 302 rods would be attached to a 351c piston. I'm have no luck researching so if anybody knows what I have that would be appreciated thanks!