i was wondering if there is a install kit with seals, shims, seals, etc. for a 7.5 and where is the best cheapest place to get this

 

Not worth the money in opinion. I bought one for my 8.8 and only used 3 bearings and the crush nut. It would have been cheaper to just buy those 4 peices. I used all the shims that were already in the rearend. Something for you to think about. Good luck