I bought the Innovate LM1 kit with thier RPM option, the LM1 is no longer for sell or supported I added thier LC1 kit later to mine to make it read and record both sides of the exhaust. I bought if for my pump gas Duster with a 518 C.I. 400 stroker motor with a low deck six pak on it, six paks rock You will need to weld bungs in for the O2 sensors, as far as AFR on pump gas mine ran well with 14.25 to 15.3 AFR at idle and part throttle, I was shooting for 12.5 to 13.5 AFR at WOT, not sure I ever got it that lean with thee sixpak The car did run low tens, 10.28 ET at 127.+ MPH with 14.2 AFR at WOT I swapped the heads and intake and carb. to a set of Indy SR M.W. size heads and intake with a single 4500 1050 CFM Dominator carb. and it was right at 12.5 AFR, that made the car go 9.993 at 134.5 MPH IHTHS