Currently running 3.70 gear and 30 tall slick at the track. Considering swapping rear gear to 4.10 / 28 inch tall tire. What could I expect in RPM change at the stripe? as I have always been foucused on other things at the time, my best recollection is that I was around 5200 or there abouts when stopping the clock. Your thoughts?

You should gain around 1000 RPM at the stripe.

Keep the 30" tall tire, and go to a 4.10 or 4.56