speedo calibration

[GKV]

i have an 03 mustang gt w/ a 5-speed manual that the speedometer is off by about +5 around 45mph and +10 around 70mph. as far as i know everything is stock in the rear end (just bought the car). i was told by 1fastmach to take it to you guys to figure out which speedo gear i need and just out of curiousity i would like to know what the ring and pinion ratio is. Price quote?
Thanks in advance,
Kyle

[MC Racing]

shouldn't take very long to figure out the gear if we put it in the air. Also the speedo recalibration will have to be done through a chip, i can do a base performance program and speedo call for $275 installed.

[GKV]

alright thanks