1974 window run/felt same as 1989-1991??

[bigoates]

Hi all I was just wondering what the difference is (if any) between the factory window run and window felts for a 1974 truck vs a 1989-1991 truck. I have 2 sets of doors for a crew cab and still not sure which set I want to use as of now.

I found a set of brand new GM window felts and runs locally and wanted to grab them for future use. He said they are for an 89-91 crew cab and or suburban. Specifically for the non-tinted rear glass version. Thought it was strange that they would make one set for the privacy tint windows and one for the clear glass..

Opinions and input would be really helpful...

Thanks