i have a 1980 olds cutlass calais and i need the defrost vents that bolt up right underneath the windshield behind the dash. i had a leak in my t top and a bunch of water got in there and rusted out the metal inside and when i went to remove the duct work the tabs where the bolts go in broke off as well. what other years and body styles will fit. it has a/c and t tops and needs interior work. the engine and trans are out of an 85 but it has about 6,000 miles on the 307 and no computers and a messed up electrical system. but i got three shop manuals one for a 1980 and two for 84's.