Advertised stall speed is not exact. If it says 3,000, what that means is that under launch with a somewhat heavy car your stall will be about 3K. But on a steady cruise it will be a bit less, like 2,500'ish.

If you're going to run a stall speed that high, then pick the gearing that will have you in that neighborhood while under a load, and a little less while cruising.

With the engine specs you list, I would expect a solid lifter cam that's pretty radical. If you use a carb, It won't like to run much below 2,500'ish anyway. EFI will tame it down for street use, but still allow full power at the top end.

If you use a 26" tire, have a 1:1 top gear, and cruise at 2,500 rpm's, your speed will be 55mph with 3.50 gears, 51mph with 3.75 gears, and 47mph with 4.11 gears.

With as much torque as you'll be making, I'd probably start with the 3.75'ish and see what you like.

 

To find out that your RPM's are going to be at any certain MPH, take your gear ratio x 336 x MPH, divided by tire height that will give you your RPM's. It is pretty close anyway. Now that does not take into account for an overdrive trany. But it gets you close with a regular automatic or stick trany.
.boB is right about the stall converters when it come to advertised stall speed. When I buy a stall converter, I call the manufacture and tell them what Car, Engine, HP, Power Range, Gear Ratio, Weight of the Car, and Tire Height. So far they have got pretty dang close to what I have wanted for stall speed.

My buddy use to use Vega converters behind his big block Chevy years ago. The big block was in a Vega and a Vega converter used to stall around 5000 or so. He burned up a lot of tranys in that car because he drove it all over and the converter only locked up when his foot was really into it.

 

5000 stall? Damnn. Well i will probably start around the 3.75, then possibly the 4.11 gears. Thanks for the advice guys.