thanks, I didn’t pay very much for this bike, I put a cheeky bid in on ebay thinking I might be able to use the frame, and won! Its then sat in the back the garage for over 12 months before i had a proper look, I downloaded a manual and i decided to see if the engine was salvageable. If I bought an engine I would still strip it to check it before I would trust it as KK said, there old bikes and the newness will have worn off by now, Ebay is full of bikes or engines that turn over and have compression, its no guarantee of anything.
What the plan with yours
And yes kk I will likely need the shims as you suggested, now the valves and seats have been done, will find out when top end is together.