it will take lots of time and modification, just get it done by a shop
Yes, even though the front bumpers are different the fenders are the same
Yes, late model bumpers will fit on 89-90 240sx
Yup. you must transfer the whole wiring harness and the ecu though, the job is easy and straight forward, everything is plug and play
240SX came with 2 different lug patterns. All 1989 to 1994 240sx came with a 4 lug 4x114.3 pattern. While the 1995-1998 240sx SE/LE's came with a 5 lug 5x114.3 pattern. Preferrably you'd want to find...
sr20det, sr20de, sr20vet,ca18,rb20,rb25,rb26,vq,ls1,2jzgett, pretty much if you can dream it the 240 can do it.