this is my truck, how is it for blowby?

Might check your main vacuum line for leak, that will cause blow by,   

Vacuum is solid

Looks good to me...exactly like my truck when warm and idling.  I have the exact same bypass setup as you as well. 

I really have to look close to notice blowby on mine otherwise you don’t really see it, mine dumps at the rear of engine on top of the front diff, I did the moparman crankcase breather relocate. A tell tale way to check is to unscrew the oil fill cap on valve cover all the way and start engine, it should stay in place, it might dance around a little but not bow off. Of course you can always do a compression check too. 

I made this video years ago.  Might help you understand what to expect...

 

 https://www.youtube.com/watch?v=8oxp-uIqpMQ

Blow by that is enough to blow the oil cap up and dance is too much. Blow by that is strong enough to blow oil out is too much too.

 

Be aware blow by testing is not a good test. It is very possible to pass a blow by test with the manometer and still have a cracked piston. I've seen this before. If blow by issues do become a issue its best to do a full compression test so your testing each cylinder for compression and cylinder leakage independently.