I'm in the process of getting the old 1951 Chevy fire truck restored(motor and parts are now off the frame) and the shop doing the work mentioned that the cab is bigger on the fire truck than the regular pick up. They say the size cab is bigger so the rubber parts in the catalogs will not fit. I thought I read the cabs were all the same size but it got larger forward of the firewall. I’m confused. They are doing a great job on the truck but their comments stopped me in my tracks. Is the bigbolt cab (6400) bigger than say a 3100 or others?

Can anyone help answer my question? I want to order the rubber kits(windows, doors & anything else) from Chevy Duty or one of the other restoration part companies but do not want to purchase kits` that have to be returned. Help.