Has anyone ever use this cam. I've always seen it around and looks OK with the exception of the higher duration. Just wondering???


Part Number: 134571 Grind Number: H-306-2 (REPLACES CCH-306-2)
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1967 Up CHEVROLET 8 ROUGH IDLE, PERFORMANCE USAGE, GOOD UPPER RPM HP, BRACKET RACING, AUTO TRANS W/ 3500+ CONVERTER, MARINE PERFORMANCE, 4000-4400 CRUISE RPM, 10.5 TO 12.0 COMPRESSION RATIO ADVISED. BASIC RPM 3800-6800
Engine Size Configuration
396-454 C.I. V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 336 @Valve 571 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 344 @Valve 585
Rocker Arm Ratio 1.70

Cam Timing: TAPPET @.0042
Lift: Opens Closes ADV Duration
Intake 44 BTDC 82 ABDC 306 °
Exhaust 92 BBDC 42 ATDC 314 °

Spring Requirements: Triple Dual Outer Inner
Part Number 99893
Loads Closed 130 LBS @ 1.850 or 1 27/32
Open 342 LBS @ 1.290
Recommended RPM range with matching components
Minimum RPM 3400
Maximum RPM 7000
Valve Float 7200

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 16 BTDC 50 ABDC 107 246 °
Exhaust 64 BBDC 10 ATDC 117 254 °

Well,,with that compression ratio u are looking at racefuel 110 octane in a boat !!!!!

I'm not looking to run it just curious? It's only .5 more than the 561 and 741. 110 might be a little overkill but it would sure smell nice. I run that in all my muscle cars. Someone should make that into cologne. I would imagine you get plenty of wiffs of it also.

I'll call you tomorrow regarding the trans.

Looks like a crane number. Maybe a little difficult getting that part...they've have been shutdown for awhile and may be up for auction. Some of the peeps are trying to bring it back but we'll see - I've got my fingers crossed for them.

I hope something happens. I heard a rumor that comp was looking at buying their assets. It would be a shame to see them go all together as they have some great grinds.

Thats a flat tappet cam and really can't be compared to 741 roller cam.

It is too big for a pleasure marine engine.

Crane cams 139651 Hydraulic Roller

Scorpion was also looking at buying them, but the deal may have died.

I was only comparing cams as to their recommended comp. ratio. Also just wondering if anyone has ever run it.

How about this one? Might be a little on the large side for my 496's? I might be wrong though as I have hever run one. The lift don't bother me just the duration. Let me know Pro1 if you have any experience with it. I'll bet that thing would bark at an idle.