I adjust mine with the engine HOT and running (you need to run the motor for maybe 15 minutes or more beyond water temp getting hot), slowest idle I can get. First I go for the exhaust valves, being carefull just slip the feeler gauge in and if it's not tight I'll adjust a little until feeler gauge just begins to stick then move on. Also watch for bent pushrods etc while you're in there. BTW do this at your own risk, you can break stuff if you get carried away.
I've cut down a spare rocker cover to keep the bleeding of oil to a minimum.
I love my HEI and it's set up as described and those numbers re. point gap are from "The Boss" he knows his stuff.
