Thanks, guys for your thoughts and suggestions. Regarding the engine EFI codes, they showed clear and also Fuel pressure was not a problem. Interestingly Wizzfizz mentioned about the engine not starting 1st go. That usually happened with mine as well.
To cut a long story short, I couldn't wait any longer to get back on the road so I went to the Wreckers and picked up a new Distributer and that fixed it. So either the coil, hall effect unit or capacitor is suspect. Did a resistance check of all components and they were same on both distributors. Just been for a 700 Km trip to Tumut and back and alls well. Best $80 I've spent in a long time!!
Thanks again,
BT