[Prong]

77-87 (up to 91 burb and blazer) doors are the same. The panels run from 77-80 and 81-87. You can interchange the panels as a set between doors. You'll also have to use the matching inner door handles/cups that match the panel years. Beds should bolt up--if you're going from outside filler neck to doors, you need the filler neck, hoses and gas cap from the newer donor truck, because they're different.