Among his discoveries: Although the original Mysterion carried twin 390-cubic-inch Ford big-block engines (the setup resembles the wild LS V-8 setup that we saw at SEMA earlier this week), the original frame couldnt handle the weight of even one engine and transmission and actually function as a driver.
So Jones recreation has an additional steel-rod inner frame. And although it looks like the Mysterion is carrying two 390 V-8s, only one actually works. The other is hollow. The two engines are joined by a cross belt so that it appears they both work.

In other words, it was all a big fraud. Nothing functional. Merely an interesting piece of dynamic art.