Timing control on the handheld can be adjusted via buttons, opposed to having to adjust the distributor with a wrench and such. There's really nothing fancy to it however. If you want to keep using the trailbeast kit, i have no issue with that. Just know the fitech would only operate in fuel only. If you want to do timing control. You need to add about $160 for a distributor, and maybe $30 for the rotor. Since yours wouldn't be compatible with the timing control. This does open up the cheaper 400 horse unit also, if you're not making much more than 400