Each distributor was different from the next. Remember to sync ignition timing everytime you swap distributors. With two the car broke up really bad. Thank god the last one seemed to do the trick. I was planning to just go with a 20V CAS and do COP. I won't play with it unless I happen to run into ignition issues. Stock OBD2 coil has been doing the job even over 300whp N/A.