Been having this issue with the timing dropping out 3* at rpm/accell and been told by many that which ever gives most retard is proper way. I just found on the msd site a note that says if using an anolog msd box than most retard is correct and digital msd box most advance is correct. I use a Ice digital box, so gonna give this a try and most advanced would orient the plug so + to + and - to - are plugged together. The collar on the end of the dist shaft did nothing for me. Anyone here really up on this?