Engine Cutting Out! What to check?

Ok that unit does provide multiple spark discharge but nowhere near what an MSD ignition box puts out. If I may ask, what is your reason for using the pertronix brand? I put a pertronix conversion in my dads boat, and although it is much better than points it's nowhere near what you need for your application. If it were me I would go with a MSD pro billet distributor and an MSD 6AL box. It's what I'm using in my D1 pro charged Dart and it works sweet and its reliable. Especially with you running 15 to 1 compression you can't afford to have any detonation issues. You will scatter that motor extremely fast. You can also open up the plug gap with the box which will allow a better hotter spark. Also to be on the safe side check to make sure there is no debris in the supply line screen ( if there is one ) because that hot fuel is rough on rubber fuel hose especially if its old line. Good luck man. Like to hear what that 15-1 motor sounds like. Bet it's nasty. Post a video.