5.9 Magnum exhaust/intake combo help

Hey Bob. How much cam are you thinking?
And what tire size?

I was not planning to swap cams at this time - though I must admit I am contemplating it as I am sure if I don't I will wish I did. So let's say, stock to mild.

Tires (for now) on my 7-1/4 small bolt are (i think) only 225/70/14

when I change out to the 8-3/4 big bolt, I am not certain what tire size yet.