I can't find any reference to a Mallory "Custom-made Unilite" in the links Dave provided. Patrick has had a Mallory electronic distributor without vacuum avance in his catalog for a good while. Is this the "Custom-Made" Stovebolt Unilite you guys are referring to?
Wayne Mfg Co had a mallory unilite with vacuum advance in their catalog but they are no longer in business. In fact I sent cash for one but got ripped off when they dropped out of sight.
Does anyone know of a source for a mallory electronic distributor with vacuum advance that will fit 6 cylinder chevy 235 and 261 engines?