Adjust valves

there are 2 styles of 273 adjusters. I have seen both but the stockers are interference nuts (they hold themselves tight) and there are lock nut styles, possible aftermarket. To adjust while running, get an old T shirt on cuzz its gonna get messy: Idle until the car gets to operating temperature and then remove on valve cover. With any luck, your oil will not get everywhere but just a little puddling at the base of the valve cover rail. Now get your 5/16 deep socket on a universal joint and attempt to get it onto one of the rocker arms. you can also try with a 12 point offset box end but it will be moving, just hold either loosely. Now tighten it with a feeler gauge on the valve stem until you cant feel resistance dragging the feeler guage on the 'idle' cycle. Continue with all 16. If you want a cleaner safer way, just do it hot per the sticker and you'll get the same results.