Anyone tried one of these HEI Distributors?

I have been testing one on my 1966 273 Barracuda, while I develop an electronic advance ignition with TBI. My 30 year old BW optical retrofit failed a while back. The immediate replacement was back to new points and tune up. The points did not run as well as the BW prior to failure. So I tried the $45 HEI. It worked better than points with OEM coil, however it seemed to miss at low rpm in parking lot situations. I put a kit in the 2-BBD carb, that helped some. Then I followed the advice of Bill Grissom, and bought an E-Core coil. That made huge difference. I think the dwell control is too short for an OEM coil, however is fine with an E-Core. I am very satisfied at the moment, however the OEM distributor with points, cap and wires is in the trunk.

I purchased a Ford TFI E-Core coil because I could also buy the wiring connector pigtail.