You can use a crowbar to remove your distributor.
I recently had to remove my Marelli distributr, (911 2.2 T 1970) for changing breaker points, and I could not rotate nor pull it out.
I came up with the crowbar, place a thick wood plank under the crowbar , use an elastic to keep clamps together and removed cable to CDI. and you can lift it out.
Still had tio use lot of force though, but eventually it came out, with no or limited damage to the distributor.
