iagree Could have been as early as 1971 date code. I have had a couple late 71 engines with cast cranks and 73 VIN's. Just find one before your SPD and slap 'er in... hammer


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!