[DAVID GAGNARD]

Bill;

I can not verify this,but have been told up to and including 1974, the blocks were a little "thicker or beefer" than the later blocks... Mine is a 1972 in my Mustang.... Also, spoke to a guy that drag races a late model Mustang with a 351-W,he usues whatever block he can find. He told me the later ones last just as long as the early ones for him. Do not know,but he claims they are just as strong.

I have enough old blocks that I'll just stick with them.. Around here,up to 74 blocks can still be found without too much looking and I get most for no more than 100 bucks,the last two I got for 50 bucks each...

David