<VV> Intermittant Corvair

[Jim Gammon]

My 64 coupe 110 2 carb 'vair runs fine for about 5 miles, then starts to buck and kick, then it dies.
 
I had assumed that the previous owner had screwed up the carbs (which he had) and replaced them with Clark's rebuilts. I did a full tuneup, cap, rotor, condenser, all wires, vacuum hoses, plugs, points.
 
Took her out today, and had to get her towed 1.5 miles home. 
 
I'm thinking the coil is the problem, but I don't know. It could be wiring or the ingition switch or -???
 
Anyone have a coil fail this way? 
 
Any other ideas?????
 
Jim NJ