I know parts on Fender basses are interchangeable, currently I own a white Standard series J, it's a great bass guitar and has served me well however, currently the truss rod is bent inside the original neck and I've taken it to a couple of people to see if it could be straightened out. Unfortunately the previous owner had the action so high that the process is unable to be done. I had the saddles lowered and the bass intonated to compensate, I also know because of the truss rod that the life expectancy is shortened due to this. The pickups are fine and give me plenty of punch but the pole pieces are higher in the middle under the A and D string so when I play on those strings, I get a very annoying magnetic popping sound from the strings coming into contact with the poles. I feel I could get more out of it and extend its life if I switch the neck and pickups to American Standard series parts. Does anyone know if you can use USA parts with a Mexican body?