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I put the sliding window from a 87' in my 77'


Yes all the glass will interchange. Just use the weather strip that matches the glass and it s all good.
One thing you need to watch for when doing any cab swap on the 72-93 Lifestyle series trucks is the transmission floor tunnel size. There were a few variations. Small round hump on 2wd automatics, large square hump on 4 speeds and all 4wd's. a small hump can be cut out and have the big bolt in hump installed but its a little trickier going the other way.