Anyone running a Stree/Strip 9 1/2 Dynamic converter

Got one in the boys Dart and we love it. It drives so nice just like a stock convertor thats just right with the MP .557 cam we have in his 400. But nail at the track and she flashes about 4200 and launches great. Very steady 60's of 1.61 and 1.62 every pass. I like it so much I have one sitting on my workbench ready to go in my 63. I paid $595. for each. Ron