Wiper arm linkage bushing FRUSTRATION!

The only thing keeping me from driving this car is the lack of windshield wipers.
The only thing keeping the windshield wipers from working is that the bushings on the linkage on the driver's side disintegrated.

I bought the dorman part that is supposed to fit. With a pair of channel locks, I could get the plastic bushing over the little stud but no amount of cursing can help me get the metal arms to snap onto the bushing.

It doesn't help that this whole operation involves being upside down in the dark holding tools up over my head.

Any tips/advice? This can't be this hard!

Attached pictures are of the bushings on but not the arms.

I can't even get the top one off now in case it's the wrong size!