340 compression test. PSI??

Hey guys so I just did a compression test on my recently bought 71 340 duster. I got between 105-110psi across the board. Is this normal? I know nothing about the bottom end of this motor, just " rebuilt" it does have head work done tho.

I did the test because I get excessive blow by out of the breather. And shoots blue out the back when revved up good.
The PCV valve has good vacume.