Here goes m46rat - working on wiring problems and forgot to post part numbers.

The white banded front belts with push button, only one still has a label & simply reads 'Chrysler Corp 1970' - one of the others has the same label with no part number...just a date: 1970

The other 3 that do still have labels/numbers:
4749 2999587 1969-3
4749 2999587 1970-2
4770 2999631 1970-2

Seems weird that a 1970 has a belt that has a 'part number' reaching beyond its model year...is this a way the factory took out a patent or maybe the wrong year belt.