360 build recommendations please...

That milling of the divider trick is a race mod that MoPar suggests to use with the large cams of the day. You may not want to do that if your cam is smallish. Under 240* @ .050.

You can get a preety stout street cam under that duration with loads of lift and power making potential. Cracked backs build shows just that and his cam, the Comp XE268, is still on the smallish side, excellent for the street. Once his heads get bowl ported up and the flow kicks up to the flow mentioned he's looking for, the power will really pick up well.