OK. I'll add a warning. If your Dizzy is a bit worn, the drive cog at the bottom gets a bit loose. It engages an offset slot at the top of the oil pump. Sometimes it is just possible to put the dizzy in 180 degrees out of sync. Then it puts a lateral load on the top of the oil pump shaft.
Of course I did exactly that. After a few miles the wiggle broke the oil pump shaft and the engine died instantly (no Dizzy!)
Just something to look out for not in the manual.