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#1
05-12-2003, 09:45 PM
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I own a 1966 421HO that is all stock and I would like to keep it at least looking all orginal from the outside. In the past I have added 1.65 roller tip rockers to my past pontiacs with great results. do I have to re-drill the studs to add these. What options do I have? Don't want to mess with the heads of I don't have to. Any hope??
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#2
05-12-2003, 09:45 PM
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I own a 1966 421HO that is all stock and I would like to keep it at least looking all orginal from the outside. In the past I have added 1.65 roller tip rockers to my past pontiacs with great results. do I have to re-drill the studs to add these. What options do I have? Don't want to mess with the heads of I don't have to. Any hope??
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#3
05-13-2003, 05:06 AM
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You can use 1.65 rockers, BUT you run the risk of pulling out your pressed in rocker studs. After 35+ years I wouldn't do it without converting to screw in studs. We stock studs with a 1/2" thread on the bottom and 7/16 tops for this application.
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#4
05-13-2003, 01:04 PM
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I guess I'm stuck. I just want to improve the performance a little w/o really making drastic changes and keeping the originality. Thanks!
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