If it's a solid cam 6 and 16, 7 and18, pick one.hydraulics obviously will be zero, one turn (SLOWLY!)after the slack is taken out. By all means,put a brick on the gas pedal so the engine warms up- on a 235 about 5000 RPM for 20 minutes should do it, v-8's I figure about 7500 RPM and 30 minutes or until the last rod flies past your head (don't forget to count!, and main bearings don't count). Happy motoring!Follow these instructions and youll never have to worry about setting your valves agian.