where to start..

Driving along at about 60 in 1970 383 Newport, coasting down a hill, heard a large thud, and the motor just stopped. No backfire or anything. Just shut off. Drifted to the side of the road and popped the hood. No leaks, drips, anything obvious. On trying to restart, it sounds like it would if, for example, a spark plug wire is out. It rumbles for a couple cycles but doesn't start. Just got it home, and am thinking about it. Figured I'd throw it up on here to see if people had ideas...

where to start..
Author: Matt Conlan