As far as advance curve is concerned your are most often better off with a later distributor from a Super Six 2bbl engine. Make sure the distributor has a vacuum advance. Distributors without the vacuum advance are also without a mechanical advance mechanism and were used on cars or trucks with electronic spark control. I have had quite good luck with used distributors since there is next to no wear with an electronic slant distributor. Personally I like the HEI ignition coil and bracket used on LT1 engines. By removing the LT1 module and redrilling the holes on the heat sink a 4-pin HEI module can be easily mounted.
