Chevrolet Factory Cam Specs by part number
Part # Lifter type--duration at .050
In/ex--Lift in/ex--centerline--description
Small Blocks
3849346 Mechanical - 254/254 - .484/.484 - 114 - 327
365HP& Z-28 302
3863151 Hyd.
- 221/221-.447/.447-114
- 327-350HP, L79
3896929 Hyd.
- 195/202 - .390/.410 - 112 -
327 300 HP
3896962 Hyd.
- 222/222 - .450/.460 - 114 -
350 L-46, L-82
3927140 Mechanical - 257/269 - .493/.512 - 112 - Off Road
3965724 Mechanical - 262/273 - .488/.509 - 112 - 2nd design
road race, short track
3972178 ?
3972182 Mechanical - 242/254 - .459/.485 - 116 - 70 LT1 360
& 370HP, 71 LT 330 HP
10134334 Hyd. Roller - 235/235 - .480/.480 - 114 - 350ZZZ and ZZ2 Crate
Motor
10185071 Hyd. Roller - 208/221 - .474/.474 - 112 - 350 345, ZZ3&4
Crate Motor
10224241 Hyd. Roller -
-
92-94 GenII, LT1, 350
10243779 Hyd. Roller -
-
94-96 Gen II, L99 265 V-8
12353914 Hyd.
- 180/194 - .378/.401 -
- GM Crane Lo speed Hi torque
12353915 Hyd.
- 194/204 - .401/.423 - 104 -
GM Crane street
12353916 Hyd.
- 204/214 - .423/.446 - 110 -
GM Crane 305-350 street legal 50 states
12353917 Hyd.
- 204/214 - .420/.441 - 112 -
GM Crane nan-emissions vehicles & off road
12353918 Hyd.
- 214/224 - .442/.465 - 112 -
GM Crane marine & off road
12353923 Hyd.
- 224/234 - .465/.448 - 114 -
GM Crane off road
12364050 ?
12364051 ?
12364052 ?
12364053 ?
12364054 ?
12370845 Hyd. Roller - 214/224 - .488/.509 - 112 - Off Road, lobe for
mech fuel pump
12370846 Hyd. Roller - 222/230 - .509/.528 - 112 - Off Road, lobe for
mech fuel pump
12370847 Hyd. Roller - 232/242 - .539/.558 - 112 - Off Road, lobe for
mech fuel pump
12551142 Hyd. Roller - 203/210 - .476/.480 - 115.5 - 96 350 LT4 w1.6
roller rockers
12551705 Hyd. Roller - 201/208 - .447/.459 - 112 - 95-96 Gen II, LT1, w
center dowel pin
14088843 Hyd.
- 202/206 - .403/.415 - 115 -
305 HO, 83-86
14093643 Hyd. Roller - 202/206 - .403/.415 - 115 - 87 350 Corvette, IROC
Camaro
24502476 Hyd.
- 121/220 - .435/.460 - 112.5
- 350 300 crate motor
24502586 Hyd. Roller - 218/228 - .525/.525 -
- 96 LT4 H.O.T. crate motor, use with 1.6
roller rockers
NA Hyd.
Roller - 202/210 - .472/.478 - 111 - 97 Gen III LS1 Corvette 350 uses 1.7 roller rockers