"I removed this from my 02' Lightning truck that had a bent rear end housing;Posi and gear are fine with about 26,000 miles on the truck.I will sell as a pakage or separately.Posi and 3.73 gear"

i have a 97 F150 with the 3.55ls 9.75 rear end. Seems like a great deal but theres no way i have the resources to do it myself, nor do i know how. so is it a costly switch and would it be a great update for my truck?

thanks for your imput!
John