Which ignition system to use?

That's pretty much exactly what our kits are, except we use the FBO limit plate, the Mr. Gasket 925B recurve spring kit and the OEM HEI coil and 8 pin module with weatherpack connected wiring instead of exposed blade connections.
Our kits are also capable of controlling EFI and timing for boost or NOS.
That's right! I forgot about your kits as well. I need to try it on my next conversion.