How much vacuum at idle?

[gray87GT]

Let's say I am coasting in 2nd gear, if I apply a little pedal it will run really sh*ty. If I apply a little more pedal it runs good, I only have a problem if I barely give it gas. If I only give it a little gas it will run sh*ty until I back off or apply more gas. It has a eally wierd smell after I run it, at first I though it was my new MAC exhaust, but now I thibk it just smeels rich. Am I loading it up with I apply a little gas?

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87 GT, BBK shorty's, MAC High-Flow H-pipe, ASP pullies, BBK 70mm T.B., Cobra intake, no smog pump, Windsor Jr irons, Comp cams 1.6 rollers, F303 cam, FMS HD water pump, Tri-Ax, FMS subframes, Battle boxes, SSM liftbars, FMS King Cobra clutch, mass-air conversion, 73mm C&L, 24lb injectors, BBK AFPR, 3/8" no EGR spacer,MAC pro-dumps, FMS 3.73's, and other piddly sh*t.