blowby, how much is too much?

Sort of off topic but i got a 4cyl carb motor (just think of it as a low po 6 with 2 less cylinders for this question) and i have some serious blowby coming out of the valce cover filler hole. Its enought to float a ping pong ball on! Im wonderi g how much is about average? Have not done a cylindwr test as i got a weak spark plug thread hole i dont want to mes with, but it doeant burn oil and aems to run prwtty good. Rings or guides? I get a little smoke on ckoked cold start for about 30 seconds but i think the po replaced the seals, but i still get a little blip on my vacuum. Gauge, drops 2 inches every cycle. Maybe a sticking or bent intake valve? Thanks