[Dons427]

To A-Snake:
Your most recent photo does show that the blocks are the same length.
But it also demonstrates the wing is NOT parallel to the inside edge of the windshield frame, and it would contact the frame at the bottom when pulled fully inward. Now that they make the wind wings out of glass; they could break. Your photo looks just like mine did before my change; it had a 1/4-inch gap at the top, and a 1/4-inch over-lap on the frame at the bottom. I made the lower mounting blocks .510-inches longer to fix this.

Since this is an original cobra it may mean that this was not designed the best that it could have been from the start. JUST SAYING!
Some were right, I think based on my zoomed in photo a Gulf race car with longer lower blocks, and a parallel gap.

I'll admit that I am a Manufacturing Engineer so maybe I am being too critical.
I would rather have the change, so the wings do not break because they were pinched at the bottom.

Don