While rebuilding my 70 QJ (7040244) I noticed a small brass orifice? missing from in the primary area. What is this, can it be replaced? In the second picture, what is this vacuum line for? The other two should be advance and PVC if I have it right? And last, the secondary vacuum pull-off pulls in and holds at 8-10" The front one takes a bit more to pull and does not hold. I'm new to this and a bit confused as to whether the front one is supposed to leak? Trying to dump the Edelbrock and get back to the QJ... Thanks in advance, Dan
That is an air bleed. Not sure if it can be replaced or not, but you need it... That fitting will give manifold vacuum. You can use it for distributor vacuum advance, or you can use ported vacuum (The smaller, lower one on the driver's side.) It's a matter of personal tuning preference The front pull off should hold vacuum. You need a new one
