I think there is a calculator on the SCCOA site somewhere for figuring that out. But roughly it would be (current RPM) * 4.10/3.27.
Another perspective - if you're interested in racing then 4.10's would be a bad choice, since it means you'll run out of third (D) before the end of the track and have to do a full throttle shift into OD, if your tranny would even let you do that. Not a good idea. I have 3.55's and I think that's as tall a gear as I would want with the AOD ratios. A lot of people also seem to be happy with 3.73's.
Plus with 4.10's, your driveshaft speed will be about 25% higher. Stock steel driveshafts aren't very well balanced, and it will be much more noticible at freeway speeds.