I am adding a facory A/C unit from an old parts car to my 67 convert. (that originally had no a/c). Its got the original 275 hp 327 with a powerglide trans., only about 70,000 original miles. This car is very stock and original in everyway. That's why I want to put in original factory air and not an aftermarket a/c. The reason I'm asking is because in the "1967 Chassis Service Manual" pg. 1A-51 Fig. 66 looks as though there's a gasket. On pg. 205 of my "1967 Camaro Assembly Manual" it looks as though there isn't a gasket. I've looked through my Camaro sales catalogs and none of the major suppliers have such a gasket listed, though they do sell part of the evaporator box itself. If anyone out there knows if I need a gasket to be correct, please respond! Where might I buy such an item? An auto A/C place? Also, if anyone out there has any experience with such an A/C convertion, please let me know of any unwanted suprises I might encounter in the future. Thanks for any information, people!!