Ok so I am trying to make it to the dragstrip this weekend and i have a 74 dart with 8 1/4 rear and I have a 01 durango 8 1/4 posi rear my guestion is can I use the posi gears in my 8 1/4 in the dart i know that 8 3/4 is the best way to go and i have one that is shortened, trused, moser axles, disc brake, and 489 posi. The problem with putting that in is time its setup for spring relo, and the backspacing on wheels is totally different. Am i p.ssin in the wind or is there a way to use durango gears.