Looking good for an old un

1. It's a Volvo, from when they were well built.
2. Your a retired mechanic
I'm surprised you have given up so easy on the pinch bolt, especially as you've buggered the end

Personally without seeing the problem, I would be using an induction coil (I have one at work)
or the oxy-Acetylene with a number 2 or 3 welding tip so the flame is small & controllable but hot.
Either method will shift it
