New engine blowby

The 110-120psi is about right for a stock type rebuild. If you want performance it takes more because there's a lot of blueprinting that has to be done to get more compression, and special parts, like head gaskets. The goose egg is your problem, and if I had to guess, zero means you may have broken a ring putting it together, or perhaps forgot a ring altogether. Usually you'll have something even if it's low if the stuff in close to right. Dont lose faith. Stuff happens.