340 Id

Got both engines apart and I can see the cating dates. Both were made 11/24/72. on the passenger side the casting number is 2780930340-4 and the other is 2780930340-3. I did not see any Knurl marks on ether crank. One engine is standard sizes while the other is 0.010 / 0.010 with a standard bore.
Thanks for all the info guys.