Drag Car plastic Windows

I have a 1974 Plymouth duster 440/727/8 3/4.

Looking to take more weight off the car.

Last season I made a plastic window for the rear of the car but that was a relatively easy job because the rear window doesn't have much curve to it.

My question is has anybody made any plastic windshields? I want to make one but I am worried that it will have to much curve in it to simply bent the plastic.
Can you use the old glass windshield as a mold and heat the lexan and lay it over the glass?

Any help would be greatly appreciated.
Thanks