Lyndon I was wondering if you use that program? and IF so... you wouldnt happen to have a 165 and 730 (both F-body) formats already done would ya..that I could nab from ya?? I am trying to learn this stuff.. but still dont have a good grasb on all the formulas etc.. Car Bytes seems like a GREAT alternative to Diacom... so thats why I would like to use it if possible.. Thanks Rick