Bboogieart, can you post pics of the front suspension?

Sounds like your truck might have come with the 4000# front end. If it did, you can probably just swap the wheel studs for ones from a 92 D250 Cummins, those used the 4000# front end and have 1/2" studs.

Poorboy is right about not mixing and matching ld and hd stuff.

Are your front rotors a separate rotor and hub or all 1 piece cast? I don't think the 2 piece were used on anything but the 4000# axle.