Pertronics ballast resistor removal question

Many choices in e-core coils. I got a $20 after-market one (China) from Steve White Performance when I bought the HEI distributor. It has thumb screws, so easy hookup. The GM "external coil" in TrailBeast photo is easy to connect to that GM 8-pin HEI module (factory GM cable), but wouldn't be as simple for an Ignitor. The Mopar Magnum engine coil works if you snip off the connector too. Then there are the red & yellow after-market stuff for $$$.