Vibration between 1100 and 1500 rpm??

[HiFlow5 0]

A couple thing to check for, look at all the pulleys while the car in running in park and see that they are all turning straight, esp the crank pulley. Check out the motor mounts. Are they new? Are solid ones, or stock type ones? I've heard about solid motor mounts causing more vibration. Since you said it still happenes in park and neutral, then I don't see it being in the converter, but I could be wrong. Also whats your timing set at? Bad timing could cause it to run rough. Lets us know what you find.