Twin Turbo 1971 Scamp Project

Bill- my drivability is in reference to the achievable power + mpg. Thats what streetable is to me. My magnum powered car feels quick, has a steady idle, plenty of vacuum, but it strains to do better than 12mpg and thats if i have the car at an unpleasant 50-55mph on the highway. Neither of which are good when i have to drive 50 miles(one way) to go racing.

With the money your going to spend to get better mpg AND power to do this swap, could you not have swapped in a 6.1 or 7.4 hemi and done the same thing with the same or less amount of money while having a much better sounding exhaust? Serious question. Not a crack on the build just to be clear