Well I've been chasing the low vacuum for over 2 years. I've replaced the intake gaskets probably 4 times. Intake is new, (Edelbrock) heads are new (pro comp) I've pulled the intake 4 times with the same results fel pro 1250. TFS cam. Motor pulling around 12 pounds vacuum. This is a 95 gt. Car has good low end power but dies up top. I did use an endoscope and appears there is moderate port mismatch. Just changed spark plugs to 3924s issue got a little better but car will still stall at idle when turning the steering wheel. At this point I feel the port mismatch is the culprit, possibly leaking vacuum into the crankcase. Motor was completely built. Good compression but haven't performed leakdown.