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The spec is to keep camshaft movement to around 0.005-0.010 inch. Knowing the distance he had Chuck grabbed this roller-bearing cam button. This style button uses an internal roller bearing that does not wear into the timing-chain cover and has small shims that will allow us to set the endplay within spec. Chuck stated that our flimsy stock timing chain cover would deflect a bit. We'll need to buy a water pump that has an adjustable stop on the back to counter act this issue without having to reset the endplay if we changed to a different cover.