I have the opportunity to pick up a pair of axles.. They are off of a 1987 3/4 ton Chevy. The front is a GM 14 bolt and the rear a GM 10 bolt. I have a 88 XJ. Would this be a good installation? I know the 10 bolt is 69" wide. If I leave it at that length would it be a problem. I would appreciate any info on this or are these axles a good choice. I can pick up the pair for $150. Thanks guys...