I have a line on (4) 36/12.5/15's mount on 15/10/8 lugs. My truck has leveling kit in front only, no lift. Cheap and I need tires, so can I use these? Anyone using rims and tires like this?

 

I am pretty sure that if the wheels are 15" in diameter, they will not fit over the rear drum brake, and probably will not fit over the front brake caliper either.
If you want to run 36" tires, you will have to find some for 16" or 17" wheels. And Im not sure whether or not they will rub...may have to trim the fenderwell and maybe the bumper.

Scott

 

I ran 31x10.50-15's on mine for a while on 8 lug 15" rims, no clearance issues on the rear drums. Not sure on the bigger tires though and whether they'd fit under a stock truck. I would guess there would be some clearance issues. . .