I managed to do compression testing and valve clearance checks on 2 engines. Next step will be stripdown and measurement to check degree of wear. Compression tests suggest worn rings/liners at the very least and as both engines were smoking this reinforces this thought.
I did manage to build up the 76 Jota to the rolling chassis stage.
In the end I managed to get out on it for a brief ride, first of the year, before the weather turned wet again.
First test for the new angle handlebars and Beston grips. Thumbs upon both counts.