270 Dart Charger

If I remember correctly the engine code was different between '65 and '66 for the 273 four barrel (or it was between '66 and '67).
I think you're right Jim, codes for 64 and 65 were different form 66.
I'm not totally up on dart chargers, what year(s) were they? The car has the hipo exhaust tip and valance cut out.