1966 Barracuda 273 Died!!! HELP

In SBMs, the gear isn't held on the dizzy driveshaft...the gear is part of the oil pump driveshaft and the dizzy just has a slotted drive...

X2, thank you txstang84, I am putting my money on the timing chain chumped off.... I have see a cam brake in the middle before, thus why the fuel pump is still pumping .. I hope it's as simple as a new timing chain and gear replacement..