You could call Dynocomp in Scottsdale to find out what they charge. They can tune our cars. My engine put out around 270 hp with a 65mm pulley and Needswings single intake. (no tune, mustang dyno) An email tune got me to 300 hp. Afterwards Jerry tuned my car long distance using my shops laptop and dyno and we got 320 hp.
Here's the last dyno I've done. I trap from 116 to 117 mph in the 1/4 mile … well, in truth I haven't been to the track in a few years and need to see where I'm at in 2016.