our dart with a very mild 360,904,3.23 gears and a 25.5" tires has been runnin a dynamic 9.5" converter that will flash to about 3500 rpm but drive around town or on the highway like a stock converter..
I know one of you in that Jersey area crew had this same deal as I did out here many time. Put a higher flash custom converter in a car and the cruise RPM dropped 200-300 rpm because it was tighter in that operating/tq range.