Thanks everyone
***BREAKING NEWS***
Big hammer 1, amazingly strong roll pin 0!

In the end, drilling the center of the pin to find a strong location for a punch (killing the edge on two drill bits) and then big hammer seemed to do the trick.
Wish the whole car was made of the stuff. Wow, that really was fun!
All drilling performed with an exceptionally helpful Dremmel hand tool too!
Didn't stop me from ordering a drill press and the vice of my dreams last night