I have a 1989 Comanche with a 1992 or 1993 rebuilt block and head, 1999 intake, 60mm bored throttle body, 22 lb. 4-hole injectors, aftermarket headers, and the existing Renix computer with the 4-spd. auto tranny. It idles good, but has terrible throttle response. I finally took it to a shop that has a scan tool. He asked me what flywheel is installed as he has got some odd scope readings. The old 1989 flywheel or the 1992 or 1993 flywheel? Since the engine was rebuilt at a custom rebuild shop I did not have an answer right off the top of my head. After some phone calls I believe it has the '92 or '93 flywheel. Are these different year flywheels interchangeable? Or is there a compatability issue between the different computer systems? If not, could this explain the throttle problems? Any help will be appreciated. Thanks...............................