Classic over carburetion problem?

Richie, not enough converter may be part of your problem, but listen to the advice on here about timing.

Before you do anything you need to find out what the amount of mechanical advance and what your total timing is. You need a nice short advance curve which will allow more initial timing, and total timing should be 34 to 36 degrees.

Once this is dialed in you can start to look at other things.

If you want some help give me a call.

THIS ^^^^^ No way in HELL would I let the FIRST thing I do be replace the converter. IMO it's well worth your time to maximize what you HAVE first and go from there. That's much less costly and a LOT less labor intensive. Once you get that sorted out, then if you think it's sluggish still, look at the converter. Even though "it might" be mismatched, you can make it run surprisingly well once you get it in proper tune.