why dont they handle mods well? my other question would be isnt it possible to get custome calibrations burnt for 88 89 factory mopar computers/ no mopar performance one available? i ask this because i have a 75 dart sport i thought about doing this to, and i have an 88 shadow with a 22 turbo in it with a custom calibration, however even before the custom cal it worked well/was easy to get factory computer to work with what i wanted it to do.