I 318 obviously doesn't have a ton of torque to start with so you have to error on the small side.
But a 3.73 gear w/3000 stall is going to want a way different cam than a 2.76 w/stock converter.
I think you need to firm up that plan first before you pick the cam.
Its a pretty firm plan, although it may not get that gear and converter right away. However, would a cam suited to that gear and converter kill vacuum before making the change? I will probably try for 3.55s first, just depends if the car stays with an 8-1/4 rear or an 8.8 ford.
