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I WANT TO INSTALL ROLLER ROCKERS ON MY 462 HEADS, DO I HAVE TO HAVE SCREW IN STUDS AND GUIDE PLATES INSTALLED FIRST.
 

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no - with typical performance cams. - Super high lift cam - different story. Kif it makes a difference to you, full roller rockers will not fit under stock valve covers, but roller tipped rockers will.
 

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What i am doing is racing the car on a circle track. Rpms are 6200 cam lift is only .425 at valve i have a set of tall valve covers i used on a set of world product heads i am changing engines and wanted to be able to just change rockers not the heads. Just to leave the engines together.
 

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racing? hmmmm.... the lift is low, but RPMs are high - i think you could go either way. BUT I don't race, so hopefully somebody will jump in here with a solid answer for you.
 

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FYI, its not true that full roller rockers wont fit under stock valve covers. i have a set of comp pro magnum rollers, 7/16 studs, and a cam w/ .610 gross lift, and i'm running the factory z28 style valve covers. i did have to grind off the factory oil drippers in the valve covers, but that was just a slight interference. a valve girdle would obviously cause a problem, but as of yet i have not needed one. in the future i likely will run a set of jesel shaft mount retrofit rockers if i have any valve train stability problems, and they too should fit under a factory valve cover. what can i say, i like to look stock and carry a big stick
 

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I have the new Jessel set-up for my new engine with TFS heads....and they fit factory covers....I have heard that from people before too, but its not true!
 

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Chicayne67 - The TFS heads have a raised valve cover rail, so you gain clearance just by using the TFS heads whether you use factory valve covers or not.

I agree with 68RS406, they are not really that much taller than stock stamped rockers. IMO You especially want to watch for interference on AFTERMARKET CAST ALUMINUM valve covers because they have thicker side walls and could hit on the side by the push rods.
 

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Good info for me -- THANKS! I have orig steel valve covers and was trying compcams Magnum Alum. Rockers. Nice to know there are some combos that will work.

[This message has been edited by RW68RSConv (edited 10-18-2002).]
 

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You dont really want the cheap rockers either. Like the summits or the proform. I think eric has energizers and he said 20000 miles tops, I have heard the gold/ pro magums or the H-sharp ones are good. I guess a race motor is lucky to see 5000 so energizers should be fine.
 
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