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Old 03-13-2007, 01:14 PM
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I removed my heads from my block to replace my cam. someone told me that there is a sequence to follow with tighting the head bolt screws, is that true? What torque shall the screws be tighten to? Also, i am contemplating purchasing a self alinging (comp cam) rocker arm with a 1.6 lift and new push rods. I plan on using the rockers with a stock cam, (stock rocker is 1.52) how will the new rocker affect the effecincy of my engine?

Shall I replace my head gasket eventhough they are new? I used the engine about 200 miles prior to this project. I have good gasket by visual observations.

Project: later model small block 350 (4 bolt)
1969 Malibu

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Old 03-13-2007, 01:30 PM
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first things first,why did you take the heads off to change the cam?vavle springs?
next,why 1.6 rockers?not worth any gains as compared to putting money and horse power into balancing ,carb,intake,headers,ignition,fuel system.just my thoughts.
finale,yes you start in the middle and work in a circular pattern working clockwise,fisrt torque them to 20ftlb,then 40ftlb,finale 65ftlb all working from the middle working in a circle.don't forget the thread sealer on the head bolts.
yes you need to change the head gaskets atleast i would.
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Old 03-13-2007, 01:51 PM
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removed the heads to inspect the condtion of the cylinder walls (my mistake), did not remove the springs. the high performance auto parts i visited suggested i use these rockers for easy upgrade and performance, so they said (rockers are the same price). if i have to perform major adjustments to the carb, fuel system etc. i would perfer to go with the stock 1.52. what is your recommendation? how true is the information i received at the auto parts.
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Old 03-13-2007, 07:20 PM
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Changing from the stock 1.5:1 ratio to a 1.6 rocker ratio has a minor tuning effect at best.
On a "stock cam" you are wasting your time and money by swapping the rocker ratio. its just an easy way for the auto parts store to get you to part with your money. If you want a real performance improvement buy a new camshaft and lifter set. There is a lot LOT more power to be had there even with stock rocker arms.
Even a cheapy $69 Cam & Lifter Set will increase the power more than swapping to a 1.6 rocker arm on a stock cam.
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