excessive 340 crankcase pressure

hey just wanna say thanks to all you A body folks for the response to my issue sorry I'm late on getting back works kicken my butt. I've up loaded some new photos I hope will help anyway let me clarify a few things mtr has just over 5k on a total rebuild new keith black pistons all the Eddy stuff was new outa box compression good (150) plugs look good car runs great & only does the blow by under hi rpm.If you look at new cars some have an O ring around dip stick & I have even seen some with a lock I've got some good ideas from here & will try & apply them & will keep my progress updated.