How much difference will a new converter make

I dropped 2/10ths in my 60ft with a dynamic 9 1/2" converter swap, the track d/a also went up about 2,000ft. I need to fully tune it back up and try it out here now that i'm in florida. ...with that build, and a 4,500rpm stall is pretty excessive. Mine will footbrake to about 3,500 with 3.91s. Just my2cents