I was seeing if anyone happened to have a cam card for the Crane 139741 cam and could share a pic of it? I lost mine and now need to set my heads up with new springs and have been finding conflicting information online of the seated and open valve spring pressures. Any help with this is greatly appreciated, thanks.

Call any other manufacturer and give them the specs and they will tell you what you need.

This close enough ?

Part Number: 168741 Grind Number: HR-236/359-2S-12 IG

Engine Identification:
Start Yr. End Yr. Make Cyl Description
1996 Up CHEVROLET 8 ROUGH IDLE, PERFORMANCE USAGE, GOOD MID AND UPPER RPM TORQUE AND HP, MARINE PERF. 3400-3800 CRUISE RPM, 10.0 TO 11.5 COMP. RATIO ADVISED. BASIC RPM 3000-6500
Engine Size Configuration
454-502 C.I. V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 359 @Valve 610 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 372 @Valve 632
Rocker Arm Ratio 1.70

Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 38.0 BTDC 80.0 ABDC 298.0 °
Exhaust 86.0 BBDC 40.0 ATDC 306.0 °

Spring Requirements: Triple Dual Outer Inner
Part Number 99896
Loads Closed 132 LBS @ 1.906 or 1 29/32
Open 414 LBS @ 1.306
Recommended RPM range with matching components
Minimum RPM 3000
Maximum RPM 6500
Valve Float 7000

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 11.0 BTDC 45.0 ABDC 107 236.0 °
Exhaust 59.0 BBDC 5.0 ATDC 117 244.0 °

You’d have to search, but i think many peeps here used isky springs, some comps, with 150-160 seat.

Thank you SB for the info! It’s exactly what I was looking for.