I had a 84 non roller engine with duraspark distributor and now I have a roller short block installed I need a steel distributor gear so I have a later model distributor form a roller engine with module made on to distributor. gears will not interchange shaft size is different .how do I wire this distributor to 84 harness. 84 duraspark distributor has 6 six wires 1 red power 1 white ground and 3 wires go to distributor and green wire goes to tach and negative coil.