+1 for the LC-1. Works great with my Megasquirt. Only have done one free-air calibration in 5+ years, just to double check that it was accurate. So far it's dead on.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more