Remmy:
Just gather up all the pieces/parts, put them in a sack, and go visit your local Rem 'smith. I took apart a Nylon 66 that I had as a teen-ager, spent 2 weeks trying to put it back together. Some of theose assembly pins are not 1 pin that goes all the way through, but actually 2 pins. And the "exploded view" doesn't show that they are 2 pins...
Wish I could help you more, but I haven't looked at an N66 in 15+ years.