I was referring to early windsor blocks (302's and 351 windsors to be more specific) and not the late style 302. I know for a fact that the earlier blocks are stronger. But i don't know how much better they really are , a few people on other boards where arguing that the R302 block is just a reproduction of the earlier blocks , that where cast/built when america took pride in making their automobiles(or when they where actually making their automobiles).