On a 69 the firwall hole is completely different. Look up vintage air. here is the manual for the 68. I boughtr one for my 69. am installing soon. http://www.vintageair.com/DownloadsSection/Surefit/Pontiac%20Passenger%20Cars/1967-1968%20Pontiac%20Firebird%20(Inet).pdf
86 Pontiac 2+2 69 Firebird Coupe(Under Construction) 69 Firebird 4 speed Vert Driveable but Under Construction 64 1/2 Mustang (Under Construction) 86 Z28 Convertible Weekend driver