Unless I am mistaken the Tufftrax is a 26" wheel mtb with V brakes. Some fundamental challenges of converting it into a Cyclocross bike, which nearly always have drop bars and 700c wheels, are that drop bars brake levers don't pull enough cable for V brakes, which is why Cyclocross bikes usually have canti's, and while bosses for Vs and cantis are the same, they would be at the wrong height on your frame/forks for anything but 26" rims.
However there is nothing to stop you keeping 26" wheels, and just put cyclocross tyres on it, e.g. the Schwalbe CX Pro comes in 26" versions. You may also want to lighten the bike up as much as possible for easy carrying, perhaps replacing suspension forks by rigid if that is what you have. You would want to go for road front mech and a chainset/bb with road chainline, because Shimano drop bar front shifters don't pull enough cable for their mtb front mechs, and mtb and road front mechs don't assume the same chainline.