Puller-me-jig in place. The metal plate is bolted to the bit that needs to come off. In the middle a long bolt (out of an M52 block!) and a nut. Theory is you do up the bolt in the middle and it pops off.
The metal is already bent from the first time it wont done up (it moved about 1/2 mm)
Carefully the middle bolt was done up until it started pulling off.
and here it is finally!
There were tiny amount of rust underneath which is what was causing it to stick.
Needs a good clean out and polish before test fitting on the M52 crank.