1973 225 valve adjustment help!please!

Listen to Dan, he knows of what he speaks. I just got done setting the valve lash on both my slantys. Takes longer to remove and reinstall the valve cover. Using a 1/4" drive ratchet and socket with FLAT feeler gauges, once you get your mojo working on the first one, the rest are a breeze. I do it at about idle speed, and it's smooth as glass. Valve cover suggestion - find a valve cover off of a mid 60's slant. It has cool ridges on top and vented breather openings for a push-in breather cap and a push-in pcv (the 90 degree metal ones) . Has all the provisions down the side for the wiring harness and to hold the heater hoses. Keeps everything clean, looks cool and it's all factory. Good Luck.