[geunther]

Im always documenting, especially date codes. The problem for me is my engine was made at the St Catherines plant. So all the good info from the Chevelle and Corvette sites are mainly from Flint and Tonawanda plants. It seems they did things a little different in St Catherines. Like I mentioned earlier, my date codes are on the passenger side of the block not on the transmission flange like most. Date codes on the intake were done differently too but I think I have it figured out.

Intake: M-20 (Dec 20, 71)
Harmonic 356 71 (Dec 22)