Seeing if this cam is good and if it will work

Best luck he would have doing this...is to recon the heads seats and spring setup.

Then it's all on the rings..of which viewing during the head recon should show either some existing crosshatch...or shine and scuff. A leak down is usually kind of a wash this case. Just look to see if the bores are in good shape.. cause leak down will tell you it's all of the above when it comes to a old used stock where the head exhausts are usually all sunk/leaking and of course you'll find some past the rings too... but it just may scare you away 'not realizing the heads will take care of a lot of that' once fixed.

Cam and head recon is my vote based on the op description so far.