The 295/50's will be about 12.4" in width. 255/60's on a 10" will give you about 11.4" of width. That is what I have on my car. Really like that look, don't know your backspace or spring height but the 295's will require some mods, IF you want to keep it tucked.
I have T/A's BTW. 10" GN rim with 5.5" BS and 1/8" spacer (which I probably don't need). No rolled lips and no notch. Lowered with Eibach's.
What size are your rims?