Stock 5.0, misses at 1200rpm?

[PureStreet]

Stock 5.0 misses at 1200rpm?
Help, this might be a long post. I bought a 92 LX recently and I've been working out the kinks to getting it to run properly before throwing the money into it. This is my 3rd Mustang, so let's assume that I've tried the basic stuff.
I bought it with 130,000 miles, bone stock with flowmasters. It sat for 14 months in the same spot. I gave it the basic tune up with plugs, wires, cap and rotor, and fuel filter. Set the timing to 14, threw in a K&N, and changed the oil. Still misses a bit. Checked the TPS, read TOTALLY off the wall, so I replaced it and set it to .98V. Helped, and runs much much better than when I started, but at 1200-1500 rpm, the intake shakes a little bit as well as the steering wheel, you can feel that it's missing just a tad. I've recently tried some other things like swap out the mass air meter, with a good one.... No luck. Tried new O2 sensors (even though there is no check engine light), no luck.
I've been told by one shop that it could be the distributer pick up. I haven't tried this yet, as I know very little about where or what the distributer pick up is or does.
Any ideas guys?


Thanks for the help!