What is your presant time how mutch are you planing on spending? I would say its posible, where are you? the hight above sea level makes a difference.

Fuel injection (better controleble), Crank pickup (dizzy takes engin power), Good ratio gearbox (can play with to get more power to wait), Diff Ratio ( can play there too), Maby a big valve conversion, Stainless sleaves (bigger bore), Traction bars or Link suspention (power to the wheels not the springs)

All these can help you get there, BUT its gonna cost you an arm and leg.
Why do you wanne do this?