widest wheel

I have a 72 duster and am going to move springs in and either make or have made a set of steel wheels.

I am running a A-body 8 3/4, and the class I want to run in will alow anywidth as long as you are DOT tired and have not cut your wells.

My question is how wide a wheel and what offset?

I am not afraid to cut wheel lip back some if needed!

You guys can save me some time if you have already been here.