should the cam be heat treated- yes, do they? most often time NO. If they did the cost would be the same as a new cam.
I wasn't aware of the Vortec engines receiving forged cranks, but that is a forged crank casting number. I learned something.
A common swap for TPI folks is either a Holley Short Ram intake OR a converted LT1 intake. Either would probably be better match for your goals.