Gas tank question

hey guys, heres my delema, i have a 1993 b2600i x cab so its fuel injected
when i move the tank to the back i will be putting a reg cab short box tank in it so it will fit between the frame rails. i will be replacing the sending unit and pump then too. shold i go with a sending unit for a 93 reg cab short box 4X4 or what do you think
thanks

I would use the pump/sending unit combo from your truck in the new tank.

i dont know if it will fit, they sohould be diffrent heights........????

Yah I agree with badchicn. They should be the same pumps/sending units from ext cab and regular cabs.