'65 GMC project- question if/what Chevy parts(need cab, doors, hood)

[azlamm65GMC]

I am restoring a '65 GMC 1/2 ton short bed/step side, I need a new cab, hood, and doors. I have read that between these '60-'66 or '63-'66 GMC and Chevy trucks some parts are interchangeable. So I found a '66 Chevy 1/2 ton that has good doors, cab, and hood. From what I have found is the hood lights are shaped differently, the chevy's hood lights are squared while GMC is slanted in the middle. Also the gauges are different in the cab, and nothing that I have found eith the doors seem to match. Also s guy told me the Chevy cab mounts to my GMC frame might be different but he said he wasn't sure. Before I buy these just want to make sure that I can use these '66 Chevy parts for my '65 GMC. Suppose to go pick these parts up either tomorrow or Tuesday so any help or some helpful links will be very appretiated
Thank you