Would a shell made for a 99 tacoma fit on an 85 pickup? both are short bed and, I haven't had a chance to measure both. Anyone know if this it would fit?

And yes I searched and didn't find anything

 

Search the bed sizes and compare. If they match your good, if not how much is to much. My canopy is to small for my truck maybe 2" short and 1" narrow. But it works for what I need. Your 85 probably has a smaller bed the the Taco. But I don't know