Ok so I compared the two clusters and they are identical in the back and like
@67Dart273 posted i was worried that the pin sequence was different but I went thru my fsm and traced and labeled the stuff on the plug and it matches if you look at the pic with both they line up you just have to picture the fsm mirrored. Idk why they made this stuff so confusing lol the first pic is the 72 the 2nd is is the 75 cluster. The last 2 pics are the 75 fsm wiring diagram vs the 72 cluster.
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