I had one today 1967 hard top 2 door SS windshield dw622 with an aftermarket gasket and a xyg glass (provided by customer). It would not fit well at all seemed like the glass was too big. i checked and that is the correct glass part. Any suggestions? Thanks

1st, brand.

2nd, gasket.

We tell customers if they bring in the parts and they don't fit right its on them ....Take your own eggs and bacon to a restaurant have them cook it and see how it tastes....

Yeah i get what you are saying, its the correct part according to mygrant and all other vendors. I would really like to help the customer out thats why i ask.

We do a lot of older cars and get into a lot of odd situations. What we do in a situation like this is use setting blocks to check the fit of the glass. These are 1 inch pieces of old w/stripping with the flap that sits on the outside of the glass trimmed off. 2 on top 2 on bottom 1 each side. This lets you check the fit of the glass and see if you have to grind anything down. Most rubber sets are a + 1/16 to an 1/8 bigger than the opening so if you don't have an old w/strip you can use something similar to check the fit.
As far a w/strips go most of the Taiwanese crap is junk. We have even had problems with Steele parts and have had repro windshields too big. It's a crap shoot and we haven't been into many Novas with problems. Something like this should go right in without any problems. Put w/strip on glass install moldings and rope in. HTH