OK, looks like I found the info on the Crane:

Part Number: 204541 Grind Number: H-272-2 (REPLACES HMV-272-2)
Engine Identification:
Year Range Make Cyl Description
62-84 Chevy 6 Good low to mid range torque, good idle, daily usageand off road, towing, performance and fuel efficiency,2600-3000 cruise RPM, 8.75 to 10.5 compression ratioadvised.
Engine Size
194-250 C.I.
Valve Setting: Intake - 0 Exhaust - 560 Hot/Cold - HOT
Lift: Intake @Cam 3027 @Valve 530 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3200 @Valve 560
Rocker Arm Ratio 1.75
Cam Timing: TAPPET @ 0.004
Lift: Opens Closes ADV Duration
Intake 25.0 BTDC 67.0 ABDC 272 °
Exhaust 75.0 BBDC 29.0 ATDC 284 °
Spring Requirements:
Part Number 99838
Loads Closed 112 LBS @ 1.65 or 1.65625
Open 327 LBS @ 1.12
Recommended RPM range with matching components
Minimum RPM 1800
Maximum RPM 5400
Valve Float 6000
Cam Timing: TAPPET @0.05
Lift: Opens Closes Max Lift Duration
Intake 1.0 BTDC 35.0 ABDC 107 216
Exhaust 51.0 BBDC (3.0)BTCD 117 228