try a different hi-tension wire on the coil - do you maybe have an internally resisted coil as well as the ignition resistor? wires backwards on coil + and -? also check the terminal at the distributor side to the coil isn't loose or doesn't have a rotten insulator

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics