Im trying to replace the 225 in my '68 Valiant. I am aware of the crankshaft pilot hole differences and I am trying to figure out which one mine is while its still in the car. The casting numbers on the block are 2463430-16. The boss is stamped 225 1029. One date code decoder puts this at May '64 but this is unlikely because my car has 108k on it and it looks like a bolt has never been turned on it. Could someone please tell me how to identify if I have the early or late style so I can select a replacement engine based on this?
