I use 3/8" and the front and 5/16" on the rear.
On the spacers they are like 3/16x3/16x1. Don't know if anyone is making them.

Last stuff I bought the spacers came with it.

Setting blocks should come with the butyl tape kit.. If not, an Auto Glass shop should have some no problem....

99% of the time 3/8 front, 5/16 rear....

Make sure you get some WS primer and apply it to the area of the glass and the pinchweld where the butyl tape kit sets.... VERY IMPORTANT....

Two people should be able to hold the glass by its edge with your fingers. One hand on the bottom and the other holding the side of WS. Communicate with each other to get an equal space on both sides, from each A pillar while setting the bottom.... It should set on the rubber/plastic setting blocks.. THEN together set the top down into the tape kit..... Apply light pressure to push the ws into the tape kit.. It wont smash it down flat, and its not supposed to , but it does need seal to the tape kit..

You can microwave the kit somewhat to soften it JUST A LITTLE.. I would try 30 seconds at a time until you soften it or just warm it a bit... It will help with the bond..
If its really hot out, disregard.....

You are dealing with a used WS... Getting it out is the hardest part... BUT there are LOTS of little tiny pits that will run ( glass will crack) so be carefull not to twist the WS or stress it while handling or installing...

Good luck

I don't have to use primer being I just had the car painted (with glass out)correct???
Car was blasted in window channels to bare metal before paint prep

The windshield primer is a black liquid put on the body that the butyl sticks to.

You and your helper need to wash your hands and not have any oil or residue on them or the glass will leak where the fingerprints are.

There must be a special kind of primer to use, correct? Type or brand? I'll be doing a install soon on my car is why I ask. Not to jump on OP topic here

So it has to have it even if surface is clean then. Guiess sell it at parts store also?

3M used to make the black GLASS PRIMER we used back in the day..

I have seen a clear type used but have never used it.....

YES a special primer for glass install... It has NOTHING to do with paint.... Really important to bond the tape kit to the painted metal pinchweld.....

Possible pic with tape measure?? Will be going into 71 charger if matters
If had some good pics I could prob by make some. Ya know the old saying. Pic worth thousand words lol

See:

https://board.moparts.org/ubbthreads/show...p;vc=1&nt=2

https://board.moparts.org/ubbthreads/show...;gonew=1#UNREAD

https://board.moparts.org/ubbthreads/show...e=3#Post7683337

https://board.moparts.org/ubbthreads/show...e=1#Post8184495

https://board.moparts.org/ubbthreads/showflat.php?Number=5161695

https://board.moparts.org/ubbthreads/show...;gonew=1#UNREAD

http://blog.drivenrestorations.com/2016/03/1968-1970-b-body-mopar-windshield.html

Last one has good photos.

71 doesn't use a gasket.

Yep no gasket on 71 b body

Years ago I worked in a wrecking yard and we sold windshields. We had all the tools to take out the gasketed and glued-in windshield and we still broke half of them. Unless you are determined to have a "numbers matching" windshield to go with the spare tire that has "original air" in it, have a pro install new glass. It probably will look better and have a guarantee by the installer. JMHO

The 3M kits I buy at the parts store have spacers included too. I think I still have a bunch of spares in a drawer at the shop.
Dallas

I haven't had a chance to look at a kit yet. I need to check it out. Thank you