TBI/MPI fuel pumps

I was just wondering if the electrical conection for the sending unit was the same on both the MPI and TBI units and if so could they be confused ? More specificly I bought a fuel tank on craigs list to replace my leaky one and don't know if it's MPI or not ..... what would be the out come if its the wrong one ? assgas:

did I mention you your opinions are welcome .. he he

93xj country