you can get the t-56 for much less than $3000, I've seen it for $2195. I personally like the Viper T-56 because it has a .50 6th gear. You could run 4:56.1 gears and still get 24mpg driving 75 on the highway!! Check this site out...
Prices are high here, but a wealth of info regarding T-56 and fox body mustangs... click on D&D Drivetrain
www.ddperformance.com/index2.htm