Hello
Well jim and everybody else are using dyna for a harley 45 deg engine not a 90deg dyna never modified there ing for a super vee i called there tech support for info and that is what they said. i had my bike on the road for testing this weekend and it ran fine rpm to the max no backfiring kickback or shattered bendix a smooth runner, I still have oil leaks witch i will resolve (new gaskets) instead of silicone only, you will need to call power arc ignitions ankeny IA, they have a ignition that will work all gen,s of supervee it,s optical and programmed for a supervee, and easy to install has to be timed to the rear cyl tdc other than that it is easy to install. talk to gary at power arc. he will fix you up i wont give out the phone number on the web but do a google search for power arc and you will find the site with the number. I also left you a message on your cell phone , TWHARLEY