1973 225 valve adjustment help!please!

Trust me it's not that hard. I did it for the first time not too long ago and as long as the idle is low it's pretty simple. I also just bought my first slant two months ago so I know how daunting it sounds....the hardest part was getting use to trying to get the socket on while the rocker while it was moving. I still have all my fingers!
i tried it with a socket on the first one then switched to a 3/8 box end wrench which worked much better and a little less intimidating ! now that ive done it one with the engine running i will always do it that way , it really was easy !