1966 389 and 1972 400 rockers are NOT the same!
The 389`s rockers are shorter, as are the push rods.
This is due to different valve angle in the heads.
The rocker is not resting on anything, it´s hold in place by the end of the valve stem and the push rod.
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1966 GTO Tri-Power
1970 GTO TheJudge
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