1966 Barracuda 273 Died!!! HELP

The cam drives the distributor drive gear and the oil pump by way of a hex shaft on the end of the drive gear. See the pic in xtangs post? That flat blade on the bottom of the distributor shaft is the only thing that drives the distributor!! First thing I would do is pull the distributor and check to make sure that tang is there and the distributor spins freely. Next, have someone crank the motor and look down the hole to make sure the gear is spinning. If it's not, you may have a busted timing chain as mentioned above. You can also back out the gear with a large flat bladed screwdriver and check the shaft to make sure the oil pump is still being driven. My bet is on the timing chain!! Geof