I am wondering if I purchased too small a cam for my 512RB engine build. Here is the combo I am putting together. I wanted it to be a street/strip buildup.But I am wondering if all that cubic inch will need more cam and duration? I would like to get a little more HP and Torque out of this combo than I originally wanted (bad planning) but here it is.

512 RB with 10.5 compression
Eddy RPM intake or TM7 (I have both)
Proform 950 Carb
Hughes 579/587 256/260 solid with EDM lifters
440source heads with springs,retainer & locks changed.
Hooker 1 7/8 Headers

This is going in a 70 Charger RT with 4speed and with Dana 4.10 gears.