Nice Job!
There were some threads - maybe moparts - where people were discussing replacement transistors.
Nacho tried what he could get down in Argentina - worked for a while IIRC.
Can you post over in Electrical?
I agree there's definately a market.
The challenge with selling 'em is reliability. Need a really good HEI unit. Even 1 failure in 100 will ruin the reputation. You know what I mean. Bad enough there will be x percentage of folks who miswire it and some subset of which will bad mouth the product or supplier.