[Ganggreen]

Hi, I’m new here, brought my brothers (he passed) 1973 Pontiac formula 455 SD home, it has a Y code in the Vin# but has a 455SD in it, I’m trying to figure out if it is a true 455SD car with the incorrect vin # or if somebody way back dropped in a 455SD in it, it’s in great original condition, saddle interior, automatic, air, auto windows, console, clock, ram air 4, all in working condition, it feels like low butt gears, I’m not a Pontiac guy, I’m a Chevy guy, trying to figure out where to start. The car was built in Ohio and sold in California and lived its life in L.A., , it’s now in Oregon . Thanks