Picked up the car this morning from John @ Kent Town Auto Tune. I dropped in a car that was running rough, backfiring every now and again and generally unhappy.

John has done the fine tuning and in one word its running "fantastic"

In the city traffic I could hardly hear the motor idling. Acceleration is smooth.

Overall I think its close to the way they left the factory.

Tasks in the tune included - recondition bosch dissy (lots of work on this one to get the vacuum, and centrifical advance curves working perfect). John has a proper dissy tester. I think this is the key to get the grey motor running at its absolute best and often overlooked if its running ok.
Spark plug gaps
Tappet clearance
Test coil output (was a bit low)
Check true TDC against mark on flywheel.
Change carby main jet from 51 to 53 then 52 and finally back to 53. Gas analysis to check mixtures.
Fix oil leak in bypass filter