As stated, the controller isn't needed for 12's, just enough altitude or octane. That 13:6 could start to deto under 6k on just pump premium. Which shouldn't be a problem for you if you're swapping heads for a ride at elevation. 12:6's (same as stock) will work at sea level on pump premium. The 13:1's need more octane than pump premium below 3k for any WOT runs. JMPE with that drop in kit on 11/12s.