Dang, when I thought I knew all the differences between 70s, 80s, and 90s trucks I learn something new. Yesterday, I pulled into a gas station in my 75 standard short 2wd next to a 91, 92, or 93 standard long 2wd and there was a pretty clear difference between the back windows. Huh...?

 

I know the rear of the cab is different. I was going to put in my rear cargo light, but the 91 has a wider corner than the crew. I will measure it up and let you all know what I have.