If someone, anybody, can't afford 91+ octane, they won't be able to afford a SC. That few extra $ a month will be nothing compared to all the other problems we have.
is this octane plug you guys speak of only on thunderbirds. i have an M90 on a 98 mustang, i had a half tank of gas on 87 octane. i put premium now, but just want to be safe. do i have one of those???
if you swapped out the motor and entire harness from the SC id imagin you should. Not sure if the 98 v6 stangs had one