It all depends on the width of those factory wheels. A 235-60-15 BFG Radial T/A is designed to be mounted on 6.5" to 8.5" rims, and 245 and 255 tires need a 7" rim width at a minimum.

Those factory wheels are probably 7". Measure to be sure.

255-60-15 tires fit nicely in the rear, but you might run into issues on the front if you stick with a 60 series tire.

Thanks. Even after I get the Dana back I've got a bunch of other stuff that needs to be done. I'm moving up to 1350 u-joints and I'll need to find a solution the e-brake cables. Don't know yet if I need to change the master cylinder yet, but the distribution block is going to need to be replaced. All this stuff I'll worry about in the Spring. Everything in this hobby snowballs.