2dr I assume?? Base model x-cabs have little cubby holes where the seats would reside. Jumpseats are optional or standard on higher up 2dr's...and all 4drs come iwth jump seats. Best bet is to get together with someone or find some detailed pics of a 2dr xcab with jumpseats and compare and see what kind of project it'll be. I think the swap itself would be pretty simple....but getting seat belts back there is gonna suck.
Though I would say...these trucks are TINY. A 5'5'' girl is cramped back there sitting on a jumpseat.
'01 XLT disguised as a '03 Fx4 Level II
Big. Loud. Slow. Bright.