found this place while trying to find out how much of my timing is controled by my Knock sensor , as I have a L-29 with one sensor disconnected but the timing is way off at -24* I know take it to someone who has a techII , but first I have to figure out a way to quiet the valve train down ( roller rockers ) so the computer doesn't see the noise don't know if a lt4 memcal will work on a 7.4 .