Which Electronic Distributor Would You Recommend

i bought a davis unified ignition, chrysler tri power ignition. I origionally bought the big hei unit, but then realized that it won't fit in an a-body. Mailed it back and they built a new distributor to match the specs of my engine and mailed it to me, and refunded the difference. i havent had any problems with it. my main interest in it was that it cleaned up the engine bay because the control unit is mounted on the distributor and the coil bolts to the intake. However, i'm not sure about replacement parts. Also, the distributors are built from used cores.

http://www.performancedistributors.com/

Steve