What does a bad torque converter feel like, symptoms??

You haven't mentioned what year the transmission/converter or the year of the engine is. This might help:
Non-Lockup 360 converters: to 1976: 11" Model, with a wide (1") ring gear, 2 weights welded to the front(engine side) of the converter.
1977 on: 11" model with a single 120 gram weight

Lock-up 360 converters: 1978 on: 12" model with a narrow( 1/2" ) ring gear. No weights on the converter front.

It could be that the one-way roller clutch (sprag) inside the converter is the issue as far as a lack of pulling power, if it is a converter problem.