Desperation

I had a similar problem with my 340, where I knew that the engine wasn't running up to par......the Holley Street Avenger seemed to work just fine and had checked everything from the ignition to timing, etc. The timing was way too high but if i lowered it, the engine wouldn't run at idle. To make a long story short, I took it to a local 'mopar-nut' garage.....he listened to the engine, revving it a little, watching the vacuum guage, ...... etc, ended up that my linkage to the carb was way too short which made for having to adjust the throttle open more and in turn again, I was getting way too much gas even before driving. When I would attempt to leave a stop light, the car would 'bog down' and then finally 'half-***' run. When the 'mopar-nut' added about 2" to the linkage at the carb & 2" to the linkage to the passing gear rod to the tranny, this made all the difference in the world. The engine now runs at about 8°BTC, idles great at about 800-900 RPM. SO the whole time, I thought the car was doing good, I was only running with 'half throttle' and gas streaming into the intake even before the gas peddle was pressed!!.
Now the engine runs GREAT. I hope this might be something to check to see if it might be your situation.......Good Luck.
Greg..........mtn_jakae