I'd say the external control module is preferable, less mechanical, a 'true' HEI, not just a substitute for the points .... the Hall Effect setup is not so much a "high energy" ignition as just a solution to keeping the external appearance of the original distributor

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