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1964-1977 Camshaft Specifications

 

Cams

The cam casting number found on the casting itself, and bears little or no relation to the grind performed on the lobes. Cam use is identified chiefly by the pattern of chamfers on the front OD, the location of the notches on the front face, and occasionally they were kind enough to actually put the last 3 digits of the cam PART # on the back of the cam.

Here's the chart produced by Karl Sarpolis that was originally printed in the Feb/1995 issue of JWO. All credit is his. Note that the part # is not the casting number.

Olds Camshaft Specifications 1964-1977
              Over Duration  Lift
Year Part #   lap  Int./Exh. Int./Exh.  Application          
1964 387484   52   278/282   .430/.432  330 Police Pursuit
     577994   36   250/264   .380/.390  330 2BC, D88 2BC
1965 387484   52   278/282   .430/.432  400, 330 4BC ST,425 ex Starfire
     388992   47   278/282   .430/.432  J88 4BC, 330 4BC AT
     558528   36   250/264   .387/.388  330 2BC
     388828   50   286/280   .427/.461  425 Starfire
1966 588528   36   250/264   .387/.388  330 2BC
     388992   47   278/282   .430/.432  330 4BC AT
     387484   52   278/282   .430/.432  425 ex Starfire
     388828   50   286/280   .427/.461  425 Starfire
     393964   52   278/282   .430/.432  400 AT ex. OAI
     393859   58   286/286   .472/.472  400 ST ex. OAI
     390961   55   281/282   .472/.472  Toro
     397328   82   308/308   .474/.474  400 OAI (W-30)
1967 396188   36   250/264   .387/.388  330 2BC lo-comp
     396192   47   278/282   .430/.432  330 4BC AT,400 4BC AT x OAI
     397744   36   250/264   .435/.435  400 2BC
     393964   52   278/282   .430/.432  330 4BC ST, 425 ex. S/F, Toro
     396190   50   286/280   .472/.461  425 Starfire, Pol.
     396961   55   281/282   .472/.472  Toro
     393859   58   286/286   .472/.472  400 ST ex. OAI
     397328   82   308/308   .474/.474  400 OAI (W-30)
     230328   82   308/308   .474/.474  400 OAI w/ 16 valve springs
1968 393859   58   286/286   .472/.472  400 ST ex. OAI
     402486   48   262/274   .440/.440  400 AT ex OAI, 350 w/ 269 Pol.
     400117   44   258/272   .435/.435  455 Irrig, Mar, hi-comp ex Pol.,
                                        Toro, hi-perf.
     400084   36   250/264   .400/.400  350 ex. OAI
     402194   82   308/308   .474/.474  350 W-31, Hurst ex CAC Casting #389410
     400165   57   285/287   .472/.472  455 Pol, Toro W-34, Hurst CAC
     402569  108   328/328   .475/.475  400 OAI after 1-1-68
1969 393859   58   286/286   .472/.472  400 AT, W-32 OAI
     400165   57   285/287   .472/.472  455 Pol, Toro W-34, F-85, Hurst,
                                        455 Mar 4BC hi-perf
     402486   48   262/274   .440/.440  3269 AT, 350 Pol.
     402194   82   308/308   .474/.474  350 W-31 OAI
     400117   44   258/272   .435/.435  455 ex. Pol., Toro, hi-perf.
     402569  108   328/328   .475/.475  400 OAI ex. W-32
     400084   36   250/264   .400/.400  350 ex. OAI
1970 393859   58   286/286   .472/.472  350 4BC ex. AT, OAI, hi-perf
     400084   36   250/264   .400/.400  350 2BC, 4BC AT
     400117   44   258/272   .435/.435  455 ex. Pol., Toro
     400165   57   285/287   .472/.472  4257, 67, 4400 AT, Toro W-34
     402486    8   262/274   .440/.440  455 Toro ex. W-34
     402569  108   328/328   .475/.475  455 4400 ST OAI (W-30)
     406768   68   294/296   .472/.472  455 4400 ST ex. OAI
     402194   82   308/308   .474/.474  350 W-31 OAI
1971 400084   36   250/264   .400/.400  350 2BC, 4BC AT
     400117   44   258/272   .435/.435  455 Toro w/2.73 axle, 455 ex 400 or
                                        Perf. Eng.
     400165   57   285/287   .472/.472  455 4400 OAI w/AC, 4400 AT
     402486   48   262/274   .440/.440  350 4BC ST,455 Toro w/3.07
     409691   61   286/287   .474/.472  455 4400 ST, AT OAI ex AC
     409717   32   250/264   .400/.400  350 5400
     409759   68   294/296   .472/.472  455 4400 ST OAI (W-30)
1972 400084   36   250/264   .400/.400  350 L34, 350 AT L32, 33 All
     400117   44   258/272   .435/.435  455 All 4BC AT, Marine LC
     402486   48   262/274   .440/.440  350 F-85 4BC ST (L34), Marine
     409691   61   286/287   .474/.472  455 L75 ST,L77 AT, Marine HC
     409759   68   294/296   .472/.472  455 F-85, 455 ST OAI (W-30)
1973 400084   36   250/264   .400/.400  350 L32, L33, L34
     400117   44   258/272   .435/.435  455 AT, Marine, 455 LC
     402486   48   262/274   .440/.440  350 ST M15, M20
     409691   61   286/287   .474/.472  455 4BC, L77, Marine
1974 409691   61   286/287   .474/.472  455 AG37, 455 W-30, Marine
                                        455 (also #562302)
     400117   44   258/272   .435/.435  455 ex W-30, Marine, 455 LC
                                        (Also #562303)
     400084   36   250/264   .400/.400  350 (Also #562299)
1975 550638   28   242/250   .396/.400  260
     400084   36   250/264   .400/.400  350 (Also #562299)
     400117   44   258/272   .435/.435  455 (Also #562303)
     409691   61   286/287   .474/.472  455 Marine (Reg.)
     402486   48   262/274   .440/.440  350 Marine
     409759   68   294/296   .472/.472  455 Marine Hi-perf.
1976 550638   28   242/250   .396/.400  260
     400084   36   250/264   .400/.400  350
     402194   82   308/308   .474/.474  455 Marine Hi-perf. F.P.
     409759   68   294/296   .472/.472  455 Marine Hi-perf.
     409691   61   286/287   .474/.472  350 and 455 Reg. Perf. Marine
     400117   44   258/272   .435/.435  455 All, Irr., ex Marine
1977 562298   52   256/277   .247/.250  260 (thru 1982)
     562299   36   250/264   .400/.400  350, 403 (thru 1980)
     562301   68   294/296   .474/.472  403 Hi-perf. Marine thru  79
     562302   61   286/287   .472/.472  350, 403 Reg. Perf Marine, ST thru 79

Notes: Overlap is in degrees.
Olds rates duration at zero lift, while most cam manufacturers rate duration at .050" lift.
ST = standard trans
AT = automatic trans 2BC/4BC: 2 or 4 barrel carb
OAI = outside air induction

Roller lifters and cams were in all 1986 and up 307's, and most 1985 307's. An easy ID is the heads. 5A heads have no roller lifter, 7A heads have the roller lifters. These lifters are of 0.921" variety.

[ Thanks to Chris Witt, Greg Beaulieu, Tom Lentz for this information ]
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