I have a HHB PMA kit that I'm going to sell if you guys are interested.
You should take a look at the Probe Engineering Ignition. I've run one on mine that was installed in 2006 with great luck.
No advance rod needed, mater of fact you remove the bushings and the whole advance system, not required.
Boyer Brandson makes the other popular ignition, more common in England though.
Because I installed it and then decided not to use it, will let it go for $250 + shipping.