Stroker Performance Review

As stated, nothing that ensuring you have adequate fuel delivery, a properly sized and tuned carburetor, and timing adjustment wouldn't help out. A custom converter certainly wouldn't hurt anything, either. You could potentially see more mph hour if your present converter loses efficiency and is "blowing through" in the fat part of the torque band. I don't expect it to be as far off as the carburetor (if any at all), but I'm only chipping in because I didn't see mention of what spark plugs and gap you are running.