Like I said, if you can get through the link without your head exploding...
You have to take this stuff with a grain of salt and decide for yourself what's right. Checking all this geometry stuff is not the easiest thing to do. Trust me, I did it. It takes patience.
You are re-using pushrods from another engine so whatever you get what you get. If you do go through with all the measuring and find that your 'geometry' is off, you might be able to 'correct' some of it with shimming the rockers up. But, you would likely never get it 100%. Correct geometry starts with the correct length pushrod installed with the intended valve gear.
