Replacing my points distributor

What's a good ballast resistor? Is there a better one to run with electronic distributor?
Good question, or better yet, what about the restoration ballast resistors?
The factory service manual calls for a 0.5-0.6 ohm, and after looking around at the restoration resisters and the limited information I could find was 1.2ohm (mine tested .8-1.0 if I did it correctly). Is that correct for the restoration style resistors?? And my next question is, how does a ballast resistor relate to the coil. The factory calls for a 1.4-1.5 ohm primary resistance coil. aftermarket accel canister style coils are in the .7 primary electronic style or 1.4 point style. How does coil primary relate to ballast resistor primary?