The motor is all stock just a LT1. I was running 1.80 60ft, I could not spin the tires. Now it is time for the roll cage, and torque converter. If you are just starting the swap now then put the torque converter in now, the stock one does not cut it. As for gas milage I donot know what it is but I used a 1/4 tank for 100 mile round trip to the track and 9 passes down the track.
Mike