[gordon]

When the bushes wear out they start to wear ledges on the pins, which stops them sliding right out becuase the weight of the spring is effectively locking the pin in place, so be sure to try and get it out with all the weight off the spring...

Dodges have a very similar system of 'headless bolts' and they can be a pain.

I think I'd be a little creative and bore a 3/8" hole through the back of the chassis and hanger so I could get lots of lube in there and drift the pins out - you could always weld them up afterwards as I don't expect you'd be worried about the problem happening again during your days of ownership ?

Gordon