Good stuff chris
Im hearing you with the Autronic just got all mine sorted ended up going for a dis4 MSD unit she cranks nicley. As for your 4 ign output the drivers are there for it you just have to use injector 5,6,7 wires to wire into your ecu for ign2,3,4. Pain in the ass but im sure your capable. As for the tacho output you can buy and adapter from Autronic!! or if you use a CDI they come with tacho output. There are 3 to choose from M&W have a 4 channel cdi as do Autronic R500 or Dis4 MSD I went for MSD as Im runnign out of funds LOL (its cheeper) around $600 The M&W around $800 and Autronic around $850. Another thing to think of with teh CDI is the factory coils will die as they are worked pretty hard. so you will have to go either 4 new Bosh coils and leads or spitfire (bolt up like factory) around $600.
Give me a buzz if you want any other info.
Cheers Andrew