Can't say for sure without Cam specs...

The goal should be to raise and extend your powerband as high as possible without sacrificing any midrange torque to get there.

If you already have headers that fit I'd look at a Max wedge EZ-1...though they're not my #1 favorite power maker head (due to the somewhat compromised {fitment vs flow} exhaust port), the excellent intake port makes most of that back up.
440-1's in CNC trim have the most power potential and with a 4 speed a somewhat "oversized' head may actually make the car more tractible at low/part throttle.....again with the right cam.