A good few years ago one of my older brothers gave me his series 11/2 that he'd taken off the road as it was only running on five.I took the cover off and found that both cam lobes on number two cylinder had worn so badly the valves weren't opening
I chucked a second hand cam in it and all was fine again
Finished up selling the car as it needed a boat load of welding which is something I can't do,still wish I'd got that car though