I'm not 100% sure what you're asking, but hopefully I've understood you correctly.
There's probably a number of different 4K dizzys, but the ones I've looked at have had mechanical and vacuum advance. So these will still work on your 4A. The curves won't be perfect, but it'll be better than locked ignition timing. Also the 4K dizzy will have points, that you can connect directly to your coil. No need for an ignition module.