Hi, I have a 76B that I finally got running, (kinda) my problem, on the exhaust manifold there is three openings, from back to front, the vacume line for the master cylinder, the EGR valve and a open hole where a thing called a gulp valve should go, I think. My problem, all of the polution crap has been removed, I need to cover up this hole to start the car and then uncover it to keep it running, if I plug the hole the car stalls, and it won't start if I don't plug it while trying to start it, any suggestions would be great and thanks!!