ok, so My 87 4.0 has some blowby problems. right now i have a custom intake that i made that goes to the inlet spot behind the head light. when i did it, i didn't connect the vaccum lines to the pipe at all. i just hooked them together. (particulary the big lines) im getting ready to do a new CCV System. im getting alot of oil spewing out of the top of the valve cover. when i do the CCV, ill replace the filler cap also. my question is: will or is it hurting anything to have the vaccum lines that used to connect to the air box hooked together? somebody told me that they have to be able to breath and i should hook them back to the intake pipe. Any help would be great.