Another (will this fit?) Wheel and Tire ?

what bolt pattern? on a duster with small bolt pattern you can run a 275 60 15 by 8 with 4.25 BS
(with some decent shocks) or 255 60 15 x7 also 4.25 BS small Bolt pattern

With 3.75 Back Space i dunno the bigger tire would stick out not a good idea