Mopar purple .528 for a 383?

That cam is a good choice for what you want + 3.91 gears. Since you don't care about low end, a single plane intake will work better with the duration that cam has.
You’re reading my mind. I have some experience with hopped up 4 cylinders and you learn how to drive without low end torque quickly.

Since I have both intakes I think it will be fun to run them back to back on the street for some real world results. My feeling is that I won’t notice a need for more low end torque with 383 cubes in a 3400lb car with 3.91 gears. But this is my first big block a body and only time will tell.