No experience with this! I guess I win the prize for biggest doofus for having let things get to this point.
Anyways, I managed to solve the problem & I'll show you how. After a couple of visits to repair shops I had all kinds of guesses as to how the fan is held in place (none of them correct). One guy had a flywheel with the right fan on it but the flywheel was not for points & condensor like mine. So after searching the internet I came upon someone who was selling just the fan. In his picture, the instruction sheet for installing the fan was spread out beneath the fan & you could just see enough to make out that you had to put the fan in boiling water then slip it over the flywheel.
So I used a heat gun to warm up the broken one to the point where you could tell it was getting a little flexible, pried up the outside edge a bit with a flat blade & it came off with out too much trouble! Hooray! So, I bought the old assembly & took off the fan with the heat gun. Cleaned it up, put it in boiling water & it slipped on to my flywheel with nary a problem, whew!
Here is a picture of how the fan is held onto the flywheel with just friction fit. There is a tab on the inside diameter of the fan that slips into a slot machined into the OD of the flywheel. Once the flywheel cools down & shrinks a little & it holds on just fine.
Here's hoping that no one else has to go through this.
Cheers
Paul
https://t.me/pump_upp