dually conversion question

[Vombrown]

One of the plans for my 82 gmc 1500 build is to add a dually rear axle this spring. I understand what is involved there. What I don't understand is the need for the front axle with spacers for the dually wheel. I have a Dana 60 for the front. Why do i need to add dually spacers then use dually wheels to being the offset back into center of the hub? Why not just leave it the way it is with a non dually front wheel? Educate me here.

 

[sweetk30]

2 spare tires and rims . . .

and need aftermarket drw fender flairs for the rear . stock wont work with out HEAVY modification work .

 

[Vombrown]

This truck has a flatbed. No clearance issue in the back.

 

[sweetk30]

sorry some reason I don't know why I had suburban in my head . . . . forget fender info .