@gogo14910 After doing more research, I’ve found out that the 73-80 band will not fit on an 81-87 cab without modification. Each clip that holds the band are attached to the cab by 2 studs. The studs on 73-81 cabs are farther apart which require a completely different set of clips. Bigger clips for wider 73-80 band.
So to answer your question. You will need the wider clips but will have to modify your cab to accept them.
Fast forward to 21:20 in this video and you’ll see that you have to drill out the new clip holes. Then you’ll have to install specific screws that will hold the clip. I would probably use some rtv on each screw to help seal the hole.
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Here are the clips. 2$ a pc
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