[the427king]

Your[now my!] block is fairly early[cast date wise] for a First week march Arlington build....there fore the heads more than likely will be after not before the block. Its the same for many yenkos. I have 3 may yenko motors with May 69 stampings for June built cars,the casting dates on the blocks are dec 68 and jan 69,and on two the heads are march and april. I wouldnt suspect that the heads in these instances would be prior to the block,unless it just so happened that a block that was sitting around for months would be matched wioth a set of heads that did the same Just my 2 cents