Hi Andy
If you want to use the Megajolt you'll be needing to run carbs on the engine, as said, the Megajolt only runs the ignition side of things.
They are not too expensive to buy at the moment, the exchange rate is heck of a lot better now than it was when bought my last one from the states
I have assembled both Megajolt & Megasuirt, I found both to be quite straight forward.
