with a stock governor, and a GC 4 speed, i could go 83 mph, down hill with a tail wind. or 83 on flat ground. or 83 up a steep hill. now with my governor shimmed up and an AUG close ratio trans w/ 3.67 final, it will go ATLEAST 125 mph on flat ground. thats all the harder ive gotten to run it so far. im going to be getting an ACN for it before too long. the .75 fifth and 3.67 will be nice.still have no idea how many rpms my car turns.. no tacho.