73 Duster - I didn't take it apart....body assembly questions

OK, I'm dredging up this old thread...more questions.

I got the Duster pretty much mocked up. All the wiring harness is back in place & everything works, so that's good. Figured out the window regulators & thank God not missing any parts there. Door latch mechanisms installed as well, doors open & close nicely - hinges are tight & even the door gaps aren't too bad for a 45 year old Chrysler...onto the questions.
  1. The drivers side door is missing the detent spring from the hinge. Is it possible to wiggle a fresh spring in there without having to remove the hinge? As noted, the gaps are nice & I'd prefer not to have to remove the door or fender. But that looks unlikely.
  2. The owner gave me the go ahead to paint the car. As part of that he wants to do a color change on the interior from beige to black. I understand the metal dash frame bolts in but it would appear that in order to get it out the windshield has to come out. Which I'd prefer not to do, because it's perfect. I read a few thins on the web about guys who used a cut off wheel to cut the j-nut clips in order to remove the dash frame but this seems sketchy to me. Curious to know if anyone has done it & has any advice...
Thanks!
Best to remove wind shield had some one try that trick .. because if you cant get them out how will u get the new ones in