Having Problems with engine ID clarifiaction (273 photos)

toolmanmike said
When I took my 66 motor apart it had 2 different heads too. One was a late 65 head and one was a 66 but both heads had the same bolts. My car was built late in December. tmm

I've found some 315 castings that were machined for the 3/8 bolts instead of the 5/16 ones. My early '66 had them.