Too much gear?

Not sure what converter is in the car, was in it when I bought it in 2000, stalls around 3800, looks like a 10 inch possibly. On the run in the video I let off before the stripe, didn't want to break out as I was way ahead. As far as the converter, I have another trans I am going to freshen up, put a manual valve body in and a new converter. what is the thought on converter? 4500 stall be enough? 9 or 9 1/2 inch? Tracks around here are done end of this month, I would like to get there one more time to see how does. The old combo would gain .2-.3 and a couple mph with the exhaust off, so that will be taken off too and let it spin to 6800. I appreciate all the responses, thanks everyone.