Those beefy axles and heavy duty rear leaf springs make me think the truck was originally a wrecker.
What other reason would there be to put such a heavy duty drivetrain under a 1/2 ton truck?
If that truck were mine, I would research it to find out what the reason was for the heavy duty drivetrain before tearing into it..
Who knows, it could of been a special order truck and kind of rare.
If not rare, I would restore it back to the original 1/2 ton torque tube drivetrain & leaf springs with a 3.55 Ring & Pinion.
