14.45 with 12 sec combo... HELP

Advance the idle timing until you find the point the engine kicks back on the starter when hot for initial. In your case, I would back off 3-4 degrees from that point.

Take that number and subtract from 36, set mechanical to get there. Get a pair of mr gasket 925b springs. Install one light stock spring and one mrg spring.

You might have to do the mechanical advance a couple times to get it spot on. Even if you are a degree or two off initial, that's going to be MUCH better than where you are now.

Bronze tower
http://www.forabodiesonly.com/mopar/showthread.php?t=66895

Cast colored
http://www.hotrod.com/how-to/engine/mopp-0301-mopar-electronic-ignition-system/

Simple to do, cast tower takes a bit longer.