Thanks 72 Blue 400 but I already modified my old brackets to accommodate the
new roll up windows. Where did you buy those or did they come on the car? Anyway, here is how I did it:

This is the quarter window I purchased already.

I placed the old window on the new with the bracket and marked on the new where the bolts that hold the window to the body should go after I was done modifying my old bracket.

I made a template that I would use to cut out 2 metal brackets to use for the new windows.

I made sure that the template was correct and put it next to the old bracket.

Using the template I cut 2 metal pieces to weld onto my old bracket.

With the template holes drawn onto the metal bracket, I needed to drill only the holes with an "X" marked on them.

I drilled 1/2 inch holes that matched up to the window holes where the regulator would attach to.
This will be where I attach the new bracket to the new window.

Next I welded the new brackets to the old ones.

Both the front and the back and then ground down the welds to make sure they where flush with the bracket.

Next I used an inner tube to cut new gaskets for the brackets.

I tapped and died the metal pieces to use again for the bracket attaching to the glass.

I lined up the bracket on the glass and the next pictures shows the newly made bracket installed.

While I was installing the brackets, I needed to place something in the holes of the glass
to snug up the bolts so I used pieces of 1/2 inch fuel line cut to length and placed them
in the holes for added security and non movement of the glass when installed in the car.
Well that's how I got rollup quarter windows to install in a non quarter window rollup car.
Hope this helps someone else.