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Old 04-23-2013, 11:12 PM
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Opinion about cam & Heads

Plans are to get my 68 Chevelle back on the road, 20 years ago I was going to make Street \ strip car, but now the car will just be driven to rod runs.

I have cam and heads that been in the closet for 20 years now, question is to use them or not, I know they are nowhere near what are available now, but I already had paid for them many years ago .

Currently the engine is 350 +.040 over, flat top pistons, double hump heads “186” with 1.94\ 1.5 valves, Victor Jr intake with Holley 3310 (750), cam is Summit Racing, SUM-1106 (Lift .488 (Intake and exhaust) Duration @ 050 234 (I & E), Lobe separation 114, If I remember correctly compression was around 9.5. Car is manual 4 speed with 4.11 gears.

I've pretty much talk myself out of using this cam, its Crower Hydraulic 00211, lift .504 Intake .519 E, duration @ 050 232 I 242 E , lobe separation 108, afraid this cam is going to be little too radical and kill to much low end, opinion?

I also have set of Sportsman 200 64CC heads; these would be early production, as I brought them 20 years ago, they are bare set, still new in the box. Main reason for consider using them now, is A) I already brought them, B)double hump heads don’t have harden seats. Would these heads be much of improvement over the double hump heads?

Thanks in advance for everyone help and opinions.

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Old 04-23-2013, 11:24 PM
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use a better cam,check deck height of pistons before ordering cam.a little roller hydraulic cam would be nice. Vic junior is more race than you need.maybe consider AFR 180 cc heads,or something else that good
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Old 04-23-2013, 11:34 PM
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The Crower cam is fine. Just be sure to use the right springs.
Swap the vic JR for a Performer RPM. Dual plane.
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Old 04-24-2013, 07:54 AM
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cam

i had a 350 @ 30 over.. used the summit K1103 cam/lifter kit.
it had a slight lope at idle and ran great.. i think the lsa was 112. i'd use it again..
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Old 04-24-2013, 08:24 AM
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I'd do some bowl work on those sportsmans, your cam is fine for now, and when you have the funds switch to a RPM intake though a Vic Jr should run okay provided you can tune your carb for it.
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Old 04-24-2013, 11:36 AM
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VictorJr and Holley 750 have been on the engine for 20 years and have performed well together, I ran inch spacer under the the Holley, I converted
the Holley to block instead plate, 50cc pump, bigger shooters, bigger jets, ect.
I also run Mallory 140 electric fuel pump & filter on it.

Maybe I should add, the engine is together in it current state, just need to fix rear main leak, runs great, I just didn't know if it worth the trouble\ that much gain to use the Cam and Heads I have had all these years sitting around.

Appreciate everyone input
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Old 04-24-2013, 08:44 PM
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If you like the power it has now then just fix the leak and enjoy the engine.When you want to step it up a little,then consider modern heads
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Old 04-24-2013, 10:44 PM
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The sportsman heads are already paid for might as well use them unless you're hold them back for something else. The only reason I would use the double humps if I had a set of the sportsman heads was if they were required by class rule or if I was keeping it all original. Otherwise I'd sell the double humps to someone that needs them.
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