Doc if push came to shove and I was particularly gifted in the machining side of things (which I'm not) I could run with the direct cam driven dizzy like you suggest. Alan I removed the dodgy water pump after the Yarra wet together earlier in the year, remember? I now don't run a water pump at all. (Incidentally I have also ditched the thermostat water exit point from the engine, and drilled/tapped two brass nozzles into the inlet manifold at the highest point of the motor - either side of the distributor - so the water has to flow up through the whole engine before exiting to the exhaust pipes. I have had another look at Pete's suggestion from Eagle Boys Pizza and I'll give them a ring to see if one of their crab caps will suit one of my dizzy's.
Oh and Alan...re the Ford suggestion - not while my arse points to the ground!!!

Woops I forgot about a certain Y-Block I have sitting in the shed

(There, that should reignite some good old Ford v Holden debate....who won Bathurst?)