400 to 451 stroker what year is best block

Since we're wakin up the dead......neither block is superior to the other and here's why. I forget which is which but here's the deal. One or the other (early or late) is a thin wall casting, but has THICK main webs. One or the other (early or late) is a thick wall casting with thinner main webs. So it really doesn't make a load of crap difference.