[chevyguyase]

I have a '54 but I can't tell an 1/8" difference with it in the truck. I did replace the rubber around the windshield though, and it was a really tight fit. I had to have the neighbor pull on the rubber on the inside of the truck as I pushed on the top outside. I used a lot of rubber lube and kept at it. It finally went in but I was afraid I was going to break the windshield or rip the seal. Like you I thought it wouldn't fit, but I took it out of that truck and I didn't change anything but paint it replace the rubber. It did bulge out at the top until it seated. Maybe a glass guy will chime in.