Classic Mustang specs, guides and calculators.
Gear ratio and speedometer calculators, T5 swap guides and reference specs.
Technical Tools
All tools- CalculatorT5 Speedometer Gear CalculatorDetermine the correct speedometer gear for your T5 swap based on axle ratio and tire size.Open
- CalculatorGear Ratio CalculatorSpeed at any RPM in every gear for T5, T56 and custom transmissions, plus a drive simulator that revs through the gears.Open
- CalculatorCarburetor CFM CalculatorThe carburetor CFM any engine needs, with the nearest common four-barrel sizes and every Autolite 1100, 2100 and 4100 on one rating basis.Open
- CalculatorTire Size CalculatorCompare two tire sizes: diameter, sidewall, revolutions per mile, speedometer error and ride height, with a to-scale drawing of both tires.Open
- CalculatorMustang VIN DecoderModel year, assembly plant, body style and engine from a 1964½–1973 Mustang VIN, with every year’s codes.Open
- CalculatorMustang Door Tag DecoderBody, paint, trim, build date, sales district, axle and transmission codes from a 1964½–1973 Mustang door tag (data plate).Open