Building a 340 6 pack Barracuda, cam help?

I have a 69 340, bored 30 over, 10-1 pistons, 6 pack set up, stock steel crank turned .010 on rods and mains with stock x heads. Need to figure what cam to put in with this set up. I plan on running 1 5/8 headers and 2 1/2 or 3" exhaust, it's a 4 speed set up with an 8 3/4 posi rear. Has 3:23's now but I bought a set of 4:10's for it. Tire size is up in the air. Wanted to put 275-60 15's on it but don't know if I have the room in the wheel well for them. Otherwise 245-60-15's. This car has to put my son's 80 Z28 Camaro in its mirror if you get what I mean. He's run in the low 13's without hooking up well so far. 106.7 mph on the top end. It this possible with what I have??