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First Generation Firebird Camshaft Codes

Year
Cam Code
Application
Duration Int/Exh @ .050"
Duration Int/Exh @ adv.
Overlap
LSA
Lobe Lift
Valve Lift as installed
1967 9777254 WC, WH, WK, WO, XI, XO, YJ   273/289 54 113 .251/.274 .375/.412
1967 9779066 YT 200/213 269/277 54 113.5 .272/.271 .408/.407
1967 9779067 WU, WZ 200/213 269/277 54 113.5 .272/.271 .408/.407
1967 9785744 WI, WQ, XN 224/236 301/313 76 115 .272/.271 .408/.407
1967 9782218 ZR, ZD   244/244 26 109 .292/.292 .438/.438
1967 9782012 ZF, ZG, ZK, ZM, ZN, ZS   228/228 14 107 .267/.267 .401/.401
1968 9777254 WC, YJ   273/289 54 113 .251/.274 .375/.412
1968 9779066 YM* 200/210 273/282 55 111.25 .272/.271 .408/.407
1968 9779067 WK*, WZ, YT, YW 200/213 269/277 54 113.5 .272/.271 .408/.407
1968 9779068 WQ, XN 212/225 288/302 63 116 .272/.271 .408/.407
1968 9785744 WI 224/236 301/313 76 115 .272/.271 .408/.407
1968 9792539 ZD, ZE   244/244 26 109 .292/.292 .438/.438
1968 9790826 ZK, ZN   228/228 14 107 .267/.267 .401/.401
1969 9777254 WC, WM, XB, YE, YJ,YL   273/289 54 113 .251/.274 .375/.412
1969 9779067 WZ, XC, YT, YW 200/213 269/277 54 113.5 .272/.271 .408/.407
1969 9779068 WN, WQ 212/225 288/302 63 116 .272/.271 .408/.407
1969 9794041 WH, XN 230/240 308/320 87 114 .313/.313 .516/.516**
1969 9792539 ZE, ZL   244/244 26 109 .292/.292 .438/.438
1969 9796327 ZD, ZH   260/260 42 109 .292/.292 .438/.438
1969 9790826 ZC, ZF, ZK, ZN   228/228 14 107 .267/.267 .401/.401
*Note:  Some discrepancies exist between published sources.
** Note:  1.65:1 rocker ratio