Hi Max,
you can go to the top of the class, tried a third coil that I knew was off a running motor I scrapped, put the head on with the decomp valve fitted and it fired straight up on the starter. At least with the decomp it relieves some of the pressure on the starter so it can spin over more easily so both things have avoided this motor going to the scrap. Now I have to work out how I can fit a decomp to the OHV one, not a lot of room to work with there