Compare the length of the pushrods on the rockers with the locknuts on top to the ones with the nuts on the bottom of the rockers. I've seen that done occasionally when a shorter than normal pushrod was used, to get a bit more travel on the adjusting screw. It could also mean you have some badly worn cam lobes, but there would probably be some very poor engine performance in that case.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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