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Brent: Here is a thought......
If the lobe lift on your cam is on the high side I have read of this happening. At maximum (or near maximum lift) the ball on the adjuster (even if it is the correct diameter) loses contact with the pushrod. This happens because the edge of the cup contacts the unthreaded area between the ball and the shank of the adjuster. At that instant the loading its too great for the surface area in actual contact and the edge of the cup fractures because IT is carrying the load. Look for marks on the area immediately above the balls of the respective rocker arms/pushrods in question. Be sure you are using the correct rocker stands for the heads that are being used or the geometry will be off.
Process of elimination
Rick
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 08-17-2003 at 02:22 PM..
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