Anyone tried one of these HEI Distributors?

I am familiar with the sounds my engine makes after 34 years of experience. It is an automatic, if I give it heavy throttle from a start it goes thru the gears and it sounds fine. If it is in 3rd and I give it medium throttle without kicking it down it rattles some at lower RPMs. By retarding the base timing a few degrees the rattle goes away, however the idle and vacuum at idle, is better with more advance. This could be improved by modifying mechanical and vacuum advance.

The ignition I am working on provides an electronic advance via a 3D table based on RPM and manifold pressure. Accurate tuning is possible for operating conditions by changing values in table. There is additional degree of freedom in the adjustment vs two 2D tables.