Really, MPI I assume as it is the only option. Did it just come in? I insured my 88 there 10 years ago with no immobilizer.and that's why our insurance company made us put imobilaizers in our cars or we could not insure them so when I have to start up my 1980 442 I have to wave a fob on front of the imobilaizer light or it wont crank over