[sixbrl440]

I appreciate the response. I discovered the CE was counter exchange and figured the age difference as the original got scattered in 1973, according to the current owner's investigation of the car when he bought it in 1981.. That made sense. Just was at a loss as to the remaining numbers.

All of the above doesn't mean a thing, save satisfying my curiosity, because if it isn't the engine the car is born with, then it is a replacement. I did know it is a replacement. Got a kick out of the bore being the same, supposedly.

The car runs exceptionally well, BTW.

Again, thanks for the help!