Jeff, with that gearing, I doubt that you will ever hit 6500.
What temp t-stat do you plan to run with those aluminum heads? I bet you will be able to squeak out a bit more power, notice the coolant temps in those dino runs.
Also, all that work, and the amount that you tinker, and you went with a hydraulic cam?
I bet she will be a joy to drive. Look at that torque curve! What is it below 3,000 when you will be in traffic?
Heh and you can still tell folks, "Oh, it's just got a little 318 in it."
Edit:
You might want to consider different tires. I am running some 275 Nitto 555 g2's on my 4400 lbs Charger, and even they are utterly insufficient. You don't get near as much rain down there as up north, drag radials may be your only option. The biggest that fit in my barracuda are 255's.