1989 one ton 4x4 dual wheels Square body

[ImLewie]

I picked up a 1989 Gmc V-3500 4x4 with a 8 foot dump body Square body front end. I am replacing the front inner and outside fenders, Radiator core and cab mount bushings. I realize I need to order fenders for a 81 -87, but need help on what I should order for the radiator and cab bushings. I am assuming I can use the bushings for the 81-87 full size truck. I called the people at LMC truck to ask them this question but the girl on the phone didn't have a clue to what I was talking about. I just need someones input to what I think I already know.