I am thinking about swaping out the rear axle in my 03 HD for an IRS out of a Navigator. Yea I know it is a dumb idea (that is what everybody has said) but I want to do it anyway. Has anybody else done it?
You have your work cut out for you. I have no idea about what is involved, but I'm sure it's not impossible.
Do you ever watch Trucks during the Powerblock on Spike TV on the weekends? One of their project vehicles is a Terminator powered Ranger that started life as a Mazda B2300. They even managed to swap the IRS from the Cobra to the truck frame. It took a lot of fabrication, but they managed to do it without defeating the purpose of starting out with a Cobra IRS instead of going completely aftermarket.
I would suppose it would be easier to cut the back half of the frame off the nastigator, and attach it to your truck.
here is one that I did years ago.uses an 8.8 from a cobra.Bolt in where the leafs were.4 bolts and it is in.Stan