94-98 rear ends, when put in foxes push the wheels out 3/4" per side.
For 10" welds I would go 5.5" backspacing. Some welds have 4.5" of backspacing, but since the wheels are out 3/4" more, than you could get away with 5.5" backspacing.
For regular wheels....
You can run any 17X8 +30mm offset and a 245/255.
You can run any 17X9 +24mm offset and a 275. They sit even with the quarters edge.
You cannot run any 17X10.5" with a +27mm offset. They will stick out of the quarters edge.