Hi Jim -

Give Chris Straub a call. He spec'd a roller for my 350 - very similar setup as yours. I'm very happy with the performance, I'm guessing it's right around your target HP and TQ.

jim

 

This should do what you want

COMP Cams 12-422-8: Comp Cams Xtreme Energy Hydraulic Roller Camshafts - JEGS High Performance

Operating Range: 1600-5400 RPM Duration Advertised: 270° Intake/276° Exhaust Duration @ .050'': 218° Intake/224° Exhaust Valve Lift w/1.5 Rockers: .495'' Intake/.502'' Exhaust Lobe Separation Angle: 110°

www.jegs.com

Or

Howards Cams 113215-10 Howards Cams Retrofit Hydraulic Roller Camshafts | Summit Racing

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To get into that HP range you will need a decent cam between 224-230 duration with a lift .500 to 550. I checked
TFS-30210003 and it showed 74CC but I am not sure what you are running. Do you know what the head/piston combination will provide for final compression.

I ran a Comp cam in my 74 350 (224/230 with .5plus lift) with World Product 64cc heads L82 pistons flat tops and it ran very strong. You listed a bunch of stuff with no specifics. Can you provide more details. A roller cam will allow for more duration and lift then a flat tappet before you start running into vacuum issues. Just realize my 1970 LTI had 11 to 1 high dome pistons, a hot solid lifter cam, 2.02 64cc doublehump heads, Winter intake with a big Holley and it made 360hp from the factory. A good roller and valvetrain will get you into the range you want if you have compression to match. Lose the points...

 

I just rechecked and I believe the heads show 60cc combustion chamber. I have done a CR calculation and get about 10.001 CR. I listed bore, rod length stroke would be 3.48., etc. Done know the piston to deck height but think it is .025. 4.100 gasket bore with 0.15 thickness. piston vol is +12.3.

 

My two recomenations above are on the low side 350 hp/400 tq works with oem stall.
If you want more hp
375 hp

COMP Cams 12-423-8 COMP Cams Xtreme Energy Retrofit Camshafts | Summit Racing

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400 hp

COMP Cams 12-432-8 COMP Cams Xtreme Energy Retrofit Camshafts | Summit Racing

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But they need torque converter with stall and wont be as smoth as the two above. If its a cruiser no need to ”over cam” it imho.

 

I am pretty sure the cam 12-423-8 you have listed is the one I ran in my slightly built L82 but with 10 to 1 compression holley, tri Y and RPM intake. Ran very good with that cam and he shouldn't run into any issue with an auto.

 

Build the 350 for the torque (375-400) max at about 3700 rpm. The low end torque supplies the acceleration 'feel' many folks like. Let the hp 'fall out (likely somewhere a little over 350). Think 'intro' 396 BB specs.

Better yet a 383 will make 440 'ish' torque and 400 hp (at about 5200 rpm) easy (a la the 'big dog' BB of the day) Nothing 'non-production spec' required. May be competitive in price (and out perform at low rpm) to the 350.

Pete

 

Purchased a Comp Cams 286H Magnum flat tappet for my former L76 327 1972 Nova, and the car ran like a raped ape...12.80's @ 110 with a 3000 stall and 12 bolt 3:73 posi. Advertised RPM range is 2200-6200RPM, but I shifted @ 7,000 and had no issues with valve float. .490 lift on both intake and exhaust, 110 degree LSA.

 

What do you guys think of this cam voodoo-retro-fit-hydraulic-roller-cam-chevrolet-small-block-270-278.html

 

Should work fine but personally I wouldnt run stamped steel rockers with that cam. I would contact trickflow and ask about more info about the springs on your heads like seat pressure, open pressure, rate, coil bind, installed height if you dont have that info.
Comp, lunati, crane, cam dynamics, wolverine and probably some more old cam companies has same owner so basically same company.

 

I'm running this cam in the 358 in my `83 Malibu wagon and I couldn't be happier with it. I'm running Dart 200 CC aluminum heads and an Edelbrock Performer RPM Qjet intake with 1 5/8" headers and it pulls like a freight train from 2000-6000.

Crane Cams 119821 Crane Hydraulic Roller Camshafts | Summit Racing

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(fwiw, I wouldn't run a COMP cam if someone paid me to--just my $.02 worth)

 

My 355 with EQ heads ran 13.22 @ 101mph in the 1/4 mile, with 3.55 gears and a TH400 with 2800 stall. This was at4200 lbs with driver in my 65 Impala. Cam is a Lunati hydraulic roller, 219/227 @ .050.

I have since exchanged the converter for a stock one. This cam works excellent with a stock converter. Very smooth idle at 600rpm in gear.

 

Summit has Comp in stock.

COMP Cams 12-423-8 COMP Cams Xtreme Energy Retrofit Camshafts | Summit Racing

Free Shipping - COMP Cams Xtreme Energy Retrofit Camshafts with qualifying orders of $99. Shop Camshafts at Summit Racing.

www.summitracing.com

 

Voodoo cam due to arrive this Tuesday. Thanks to everyone who responded. As a side note lunati said they were unable to get cam blanks. I was lucky to find a vender that had one.

 

Jim did you go with your cam that you posted. Can you share what Lunati said about the cam?

 

Yes the one I posted. Just went with the recommendation of our engine expert in our Northstar Chevelle club here in Mn. Lunati said due to COVID the only two manufactures of blank are way behind and have slowed down production. The don’t know when more blanks will be available.