The Stovebolt Site Forums The Parking Lot Big Bolts 42 chevy 11/2 ton rear end swap

im wanting to pull the factory 2speed rear out of my 42 ton and a half...im wanting to replace it with a later model 1 ton chevy rear ...anyone done this ????i know that ive got a rear out of a 84 cab&chassis and they are a little shorter than a dually rear the rear i have is about 2inchs to short....