The 2wd wheel wells are smaller than the 4x4, and they don't stick out as far. Measure the difference between it and your 4x4, you wil probably have to trim the fenders some, which you can then cover with some flares. The flares wil also allow you to run wider tires/rim combo if you want.

If you don't want to cut them and run fender flares, look for a standard cab 4x4, the 6' bed will be the same as the X-cab.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed