I am glad you got it going in the end and that only minor problems remain. A few days ago I started the Mk I which I have been working on for a Club Member for the first time. The technique of full (bi-starter) choke, kick over each cylinder compression, turn on ignition and kick again had it running on the second kick. You do need the throttle open a little way - perhaps 1/8 of total - throughout the kicking over process. I failed to mention this is my earlier advice to you, for which I apologise.
Having got the MK I going, it has taken me 3 days to stop the clutch from slipping and to persuade the brakes to work. In the end I simply replaced the fibre clutch plates with old cork ones and secondhand springs replaced the ones which came with the bike. In the case of the brakes, it boiled down to a little use, followed by careful adjustment, followed by a little use, followed by careful adjustment, etc.
The Mk I can be a very nice bike to ride. This particular example is a beauty for its ability to run smoothly at very low revs.
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.