Intake .006 and exhaust .010, engine warmed up to normal op temp. Set it up that way on assembly, and reset it after first start up. To set them with head on the engine (and to do it off is wasted, probably), set the crank pulley to #1 tdc, and set the 4 valves on the cam base circle (the ones that are completely closed). Then turn the motor one complete revolution to tdc again, and set the other 4 valves. Tighten the adjustment screw until you just begin to feel drag on the feeler gauge as you slide the gauge in the clearance. The bent tip feeler (a.k.a tappet) gauges are nice for this.