72 360 first start question

First you're 'on the trolley'....now you're 'off the wagon' LOL.

Well, your test results sound good as long as you did it without reference to the crank mark while measuring the valves and then looked at the crank pointer afterwards. I just emphasize this 'cuz it needs to be a blind test in a way, so you don't fool yourself; cam timing is an easy place ofr anyone to foll themselves. At some point, if I was you, I would learn how to use a degree wheel and recheck the intake valve for what is called 'intake center line' (ICL) which is a precise spec on your cam timing and is no the cam card. Just do this to be sure on the cam timing.

Maybe you are getting it licked now. BTW, were the heads shaved in the rebuild or the block decked? I ask as any intake sealing issue will often start with either such operation being done, without the necessary matching machine work in the intake.