Here is a copy of the spec sheet -
Camshaft Specification Card
Part Number: 284281 Grind Number: H-296-2 (REPLACES CCH-296-2)
Engine Identification:
1955 1981 PONTIAC 8 FAIR IDLE, PERFORMANCE USAGE, GOOD MID-RANGE HP, BRACKET RACING, AUTO TRANS W/3000+ CONVERTER, 3800-4200 CRUISE RPM, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6500
Engine Size Configuration
265-455 C.I. V
Valve Setting: Intake .000 Exhaust .000 HOT
Lift: Intake @Valve 473
All Lifts are based on zero lash and theoretical rocker arm ratios.
:Exhaust @Valve 488
Rocker Arm Ratio 1.50
Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 35 BTDC 81 ABDC 296 °
Exhaust 83 BBDC 41 ATDC 304 °
Spring Requirements: Triple Dual Outer Inner
Part Number 99838
Loads Closed 112 LBS @ 1.650 or 1 21/32
Open 296 LBS @ 1.190
Recommended RPM range with matching components
Minimum RPM 2800
Maximum RPM 6600
Valve Float 7200
Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 10 BTDC 44 ABDC 107 234 °
Exhaust 58 BBDC 4 ATDC 117 242 °
Remarks:
MAINTAIN .040 MIN. BETWEEN ROCKER ARM & RETAINER AFTER VALVE ADJUSTMENT WITH VALVE CLOSED.
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