Hey Friends.

I have 4-11 gears on the rear end of my 56 and I am looking to replace it with a highway friendly rear end. my rear end measures 59.5 from where the wheels bolt on. what GM rear ends are easy bolt ons? I have a 327 appx 300 hp with a TH350 tranny . What ggear ratio is the best for highway driving. Thanx DH