1973 7 1/4" BBP complete 2.76 gear suregrip rear

I have to ask, is 73 the first year that 7.25 would be a LBP or is it still a SBP? thanks

Yep, 73 was first year for BBP 7 1/4. It would have been in a car with front disc brakes. Cars with front drums would be a small bolt pattern slant 6 car. All 73^ V8 A-bodies got front disc brakes.