Factory High Stall converter

When I put the the 360 in my dart over the winter, I bought a reman High stall converter from a trans supplier. It is the small 11" converter with the single butterfly weight on it. It works fine. At first I thought it was sluggish B/C it had 2.71 in rear. I now have 3.55, but lacking in bottom end performance. If the car is rolling alond it will scream. It is a mild, close to stock, build with a small Crane Cam 216* duration, .454 lift., headers, Weiand intake 600 holley.
I am thinking I should put in a 2200-2800 stall converter toreally wake the car up.