I've got them on my 86. I'm getting a little detonation even w/ low boost~12-13. i'll check the plugs this weekend. I have the fp set @ 42 lbs w/ vac off. Also running 42.5 lb inj, EP front mount and a TA-49. The car doesn't seem as strong as it should. I'm ordering the scanmaster tomorrow. Btw don't worry, I have not been "beating" on the car, it's perfectly drivable, idles great. Just a very,very slight "ping" at anything over half throttle. Thanks,,, Ross L