Used Glass
...Is a PIA and dangerous to boot .
If you take out and re - install the windshield , be sure to seal up the edges with silocone before you put the rubber grommet on else it'll de - laminate .
I've had good reults in reducing glare from pitting & scratches by polishing with RAIN-X , I wonder of maybe you can use one of those headlight lens cleaning kits to reduce pitting & scratches on old glass ? . I can't see why not .
Mind the thickness if you have your windshields re placed , these trucks use a thinner glass and the common thickness doesn't fit in the rubber well , leaks and so on . always make sure they understand you want your old pattern glass returned ! .