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my alum. block and 440-1, set -.008 and recheck when hot, on super cold days lash would go to almost nothing.

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Most aluminum head manufactures recommend 70 lbs ft with moly lube.An all aluminum engine will expand .015 to .018 so we usually set cold setting at 010 less on the intakes and .012 less on the exhaust.We never set them any tighter than .005.cold.Cold setting should only be used for initial start up then the valves should be set at hot run temperture.Always make sure you have plenty of piston to valve clearence.