I pickedup a WC T5 for $100 this weekend. It looks good inside but has been opened at some point in the past.
I was trying to figure out speeds & shift points and came across this Gear Ratio calculator by TREMEC. You can select many Tremec transmissions or change the gear ratios to fit what you have. After each change, just click the CALCULATE button.
It will also figure your tire height using your aspect ratio and the rim diameter.
http://www.tremec.com/calculadora.php