8 1/4" Question

i know the 2.76 was a ratio...the 7 1/4 i pulled out of my dart had that also i know there was a 2.94 as well...i had a 76 aspen with a 2.94 8 1/4 rear...ill have to look but i have an old a$$ manual with the housing size and available rear end ratios...more to follow...