8 1/4 rear end questions

I run one in my '75 Duster with no problems...not much in the line of different #s...correct that you do not want the 2.45 ratio...I have one of those sitting in the next room...the yokes came in 7260 and 7290 u joint flanges...You dont want an open one...they're weak...the sure grip carriers are much stronger, and available in auburn cone and flat clutch models...