First thing this morning I re-assembled everything. Installed the new plug leads and vacuum advance pipework as the old units were looking a bit crusty. Put in one of those new silicone tappet cover gaskets so I've now solved the slow oil weep I had running down the block near the thermostat housing. The old cork gasket had pulled inwards so I suspect the previous owner tightened down the tappet cover a bit too much.
Setup the new 45D with cylinder 1 plug lead pointing to the 1 o'clock position, squirted a bit of "start ya bastard" into the SU and she fired up on the first turn of the key. Chucked my timing light on and the new dizzy needed a very slight tweak to get it perfect.
I let the engine warm up to operating temperature and then popped my Gunson colour tuner on and tweaked the mixture a bit.
Took the Moke for a quick run and its like driving a totally different car. No engine stumble and its pulling like a freight train. It's never run this good. Checked the plugs when we got back and it was running a bit lean, so I've tweaked the mixture a bit more and I'll keep an eye on the colour of the plugs after the next few drives.
An interesting aside is that the exhaust note seems a bit more throaty. I thought that maybe my ears were playing tricks on me, but I had the Mrs with me and she was the first to comment on the change, so it's not just my imagination.
Anyway, needless to say we are both very happy with the results of fitting the new electronic dizzy.
My sincere thanks to Terry for being so generous with his time and knowledge and to Steam for his advice too.
Happy Moke'ing All.