[Citroënbender]

A good effort so far, to right the ship!

It’s well worth either finding a suitable ring gear locking tool, or cobbling one up. The “slip and grip” type pulleys also often come with angular torque specifications which are pretty impressive - if you’re adding two lots of ninety degrees to a 1,5mm pitch crank bolt, that’s stretching it by nearly 30 thou. (Random example, not your specification.)

Also worth investigating is whether the big ends suffer in these engines if you have a top end failure. It’s a problem with Alfa fours of the same era, the bearings can get flat-spotted.