Old Hillbilly
 

you might be able to squeeze a 275/55/16its 27.9 tall tire and 10.3 wide tire.

if not just run a 255/50/16 which is a 26" tall and 10" wide. it would be the same height as a stock tire but a little wider. i run this size in DRs. and have no clearence problems. but you might run into clearence problems with the quadshocks on stock rims. the 275/55/16 youll have to relcoate the quadshocks to run this size.