This,plus some more. That 4.00 inch arm tames camshafts & adds low end torque. I like the cam ,you suggested. I would pull the heads,see if you can find a local head porter. Doesn't take much,to really make them work. I like the intake you have. Mopar Muscle did a feature car,with that intake on a similar 416. Was quite streetable(3.91-4.10's). If you have the patience & want to learn,it's feasable. FWIW,Built a similar 408,stuffed WAY more cam.,Borderline drive able,yes . Strokers are so forgiving in tuning ,compared to short stroke builds.
