The other way with a 235 and hydraulic lifters, when the static methods fail (and they sometimes do, and I know some do not care for this method), is to set the valves with the motor running. This takes some getting use to. Turn the idle down until the motor is just barely running. Get a wrench and screwdriver (I use a Vaaco screw holding screwdriver), loosen the jam nut (yes it takes some practice, lol), loosen the adjusting screw until the valve taps. Turn the adjuster in until the tapping stops, turn anywhere from 1/4 to 1/2 more, tighten the jam nut and move to the next cylinder. Sometimes, these motors for whatever reason, just will not adjust statically. In those instances, or not, this is an alternative.