Just looking at a regulator now. This is from a 49 (no-vent).
The round unit with the winder and spring has a large geared semi-circle which the window crank turns. Attached to that with rivets is another piece about 8 inches long. It fastens to the scissor pieces and where it joins there is another bracket with 3 holes to bolt it to the door. On the scissor which rides up and down is a piece with two rollers (although these don't roll) which slides into the channel on the window frame. These rollers are on either side.
If you need pictures email me and I'll send you some.
Bill


1949 Chevy 1/2-Ton
"Sedgewick"
In the Gallery
1989 Caprice