65 Barracuda electronic ignition, orange box, ballast resistor questions

Cool, I didn’t remember you had one in the pictures.

Coil choice depends on what you want, stock or performance.
I bought a stock coil because I had a road breakdown. It was a master pro, which I largely consider to be cheap Chinese junk, but it was the only one they had. The terminals were the “one side flat” bolts to make sure you got the right wires on the right terminals like the original coils. The metal used in the bolts was so soft that they stripped out & got loose. More problems. I took it back & was going to trade it in for a Borg Warner ( or maybe it was a Bosch). Opened the box & it was the same crappy coil. I bought a chrome Mr Gasket for a few more bucks and it looks nice and has worked good.

It is just a stock coil, as that is all I wanted. There are a lot of others who have a lot more experience with performance coils on the forum that should be able to give you some good suggestions if that is what you want.