360 Aftermarket Heads on 318

Unless you are racing the car, do yourself a favor and replace that cam with one more appropriate when you install your Edlebrock heads.
I got a dumb question… say I get some flow numbers on whatever heads I end up with, 360 aluminum, ported 318… etc. what would getting a less aggressive cam actually do. I mean sure it’ll raise manifold vacuum since the one I have now only gets 10-12. It’ll idle smoother sure, sound probably smoother and less choppy. But what’s the benefit? Better mileage? Would I get better drivability? I mean I’ve taken it 30 minutes down the road didn’t seem to be any different. Just wondering in a practical sense.