I am swappin the cam in my L03 for a '96 LT1 cam ( .447/.459 Lift 117° Lobe Seperation and 205/207 Duration)

Can my whimpy heads handle the 1.6 Rocker Arms? (.477/.490 Lift with the 1.6)

Won't do any good, unless you get rid of the swirl-port heads. Doesn't matter how far you open the valves if that's not the smallest part of the intake tract.