hi, i have a obd2 interface that connects to any '96 up GM obd2 ecm. this also comes with the serial cable to connect interface to pc/laptop. i also have a copy of digimoto 4.03 (pretty awesome software). this monitors calculated load, coolant temp, short term/long term fuel trim %, intake manifold pressure, rpms, speed, fuel pressure, ignition timing advance, intake air temp, all o2 sensors and much more. allows data logging, 0-60 times, 1/4 mile, 1/8 mile and also dynos hp and TQ. $60 shipped. if interested, email me at- thats_reality@sbcglobal.net