Topic: Cam Shaft ID help
in Forum: C3 Engines
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3917291....67-68...302/327/350..Camel hump,no accessory holes,64cc chamber
Good Afternoon Sulm68,
The aforementioned heads (461/462)are the brothers to the 291's. You have great flow characteristics as needed to produced the horses and torque and a step better than the 461/462,which I still have in stock just for a nostalgic build, because of their flow stats. You have a little better set of the 291 series because of the casting date code which, in the event you have not decoded, were cast on Jan,22,1967 and were used on early 302/327 engines and early Camaro 350's not many of these old boy's around. They are as rare and sought after as the 186 that used predominately on Vettes and Camaro Z 28 engines..Please note the intake runners,how nice and rectangular and defined they are which makes them flow excellent....The data above is for your heads.
Sorry I get a bit long winded....To the main question of these heads for what you want to do, and the answer is a very positive yes.
Good Afternoon Sulm68,
Better than the 461/462 ..
Someone must have done a valve job or at least changed springs and removed the rotators on the exhaust valves which would indicate they changed the springs to VS 739R springs used also on Z28 and Corvette for performance engines. I can not tell by the photo,however if you look through the spring you should see a flat spiral spring.
Spring diameter should be 1.2456..
All information tells me you have the "makin's to keep you shakin' in your Vette
I hope this is a help and I have been some assistance and feel free to ask any question I may be of help...
Take care and good luck....
Sal C nosal1SPONSOR AD:: (Our Sponsors help support C3VR)
Sal,
I can't thank you enough. 
You obviously are extremely knowledgeable and are what make C3 REGISTRY such a great website. Thanks you too, Adam.
You obviously are extremely knowledgeable and are what make C3 REGISTRY such a great website. Thanks you too, Adam.Scott Ulm
sulm68
Scott,
You are very welcome and thank you for your kind comments.
I just noticed that you must have a manual trans(I noticed the clutch ball bracket) and can run at a lower curb idle 650-750 rpm with the higher lift cam.
I wish you luck and again if there are any questions please let me know..
Sal C nosal1
I'm planning on going with with the 229-1990 cam and comp cam roller tipped rockers. The springs do have some type of inner spring so I'm assuming they are all right. We will probably vacuum test them the valves to confirm their seal. I hope all this turns out all right. I'm a little nervous.
sulm68 Scott,
Good choice on the cam and roller rockers.. You will be OK on the springs. I assume you are going to get new lifters as well. You should replace timing chain and cam sprocket unless they are new,which is unlikely.. In any event you should not have any problems with the cam rocker combination.
As I mentioned before,if you have any questions please let me know.
Take care
Sal C nosal1
in Forum: C3 Engines
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