Update: Decided to remove the manifold. Took the front nut off by hand, the stud came out with the rear, middle two seemed tight, gasket was split top to bottom between #4 port and rear intake. Have ordered new studs and gasket from Mike's. Even if this doesn't fix the problem it's still a fix that needs to be made. My buddy is upset enough with the way the car has been running that he is threatening to sell her and I would hate to see that happen - everything else is good and I need another "A" to run around with!