Anybody know what A body was produced

I thought that too,,but i found the trans at a salvage yard, way back in the storage, it had been long forgotten about,, and the inventory tag on it says it was inventoried 8/71/prudential total,,,,,,,,,but i got the same results searching,,only b bodies at lynch rd. I'd hafta assume somebody must have changed it from almost brand new,,,thx for looking,,,i just thought maybe i was missing something