It will act like a 3.20:1.
That's a nice hiway cruise gear...
A little over 2,300 rpm @ 60mph, and about 2,700 @ 70 with a 28"-tall tire.
You'll have a little converter slip to add to those numbers, but not much.
If it runs mid-90s in the quarter, you're looking at 4,800 rpm going thru the traps... just right! :)