Breather to PCV

5 inches of mercury equals 68 inches of water column. IMO that is excessive.
If I had to make a educated guess I would venture to say you have an internal vacuum leak causing high crankcase vacuum.
Let me ask, do you have a hard time getting the engine to idle down? Like to 750 rpm?

SURELY U JEST , NO VACUUM LEAKS , AND NO , A SOLID .600 LIFT STREET ROLLER w/ 250 duration at .050 , will not idle down to 750. I could get it to idle down a bit more , but doesn`t deem to benefit anywhere , ''vacuum leak causing hi vacuum'' , ----------you`ll have to explain that one to me .
I think the good vacuum is from the gapless rings ----------and a ''finally'' sealed up engine .
If it had a smaller cam , it could probly run power brakes , which I dont have .
It is running very well , and raps like a small block.