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this is what can happen. i'll build a new stand and fix it, but i know my customer wishes he'd never heard of those things.

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Dan,we see that alot with both iron and aluminum heads.Mostly when some one puts a washer under the shaft and trys to fit it by cranking down the bolt or stud nut.Generally we just machine off the stand and make a block with a through hole for the shaft and vertical hole for the hold down stud or bolt.That way we can offset the shaft hole up or down vertically or laterally to correct the geometry.On high lift,high pressure applications we add a locating pin to indicate the block to the head to keep the blocks in place since the holes for the hold downs need to be oversize for relocation and oiling.The block with 100% contact around the shaft and the large seat area(block to head)makes for a stronger attachment for the shaft and allows for unlimited correction capabilities.