16" tire sizes

[Kevin O'Connell]

I've got the original '94 million spoke wheels on mine. I have 12 of these wheels, 4 of which are new. I have been thinking of widening a pair for the rear. Wonder if there's clearance to widen the inside of the wheel and where to cut them inboard of the bead. if so, could I use spacers to widen the track if inside clearance is an issue?
If so, how wide and what 16" tires will fit? 3.73's going in as soon as snow melts! Traction is already a problem.
Nitrous and water/methanol injection after that will just make it worse.
Car is sensor lowered already, running 235's now.

 

[NoLimit95]

Seems like 265's will clear fine with the 16" up to 10" wide and 255's at 9" and no fender rolling or anything needed. I could be wrong but if I am, someone will fix it.