Valve lash 350 small block?

you would probably want to call your local machine shop or part store.....but ,the valve lash adjustment for a Chevy 350 with hydrolic lifters,I believe, starts with the #1 piston at top dead center...tighten the intake valve rocker arm just enough so that the plunger inside the lifter is just below the snap ring...then go to the next piston in the firing order for the intake valves...when all the intakes are done you should be at #6 piston tdc...then go through the same steps with the exhaust valves...again I would double check, it's been a while. good luck