Chevy & Other GM Cars Super T-10 Four Speed Transmission in Gastonia, NC

I have a GM Super T-10 Four Speed. This is the Trans that replaced the Muncie Four Speeds when the Horsepower and Torque exceeded the Muncies ability to hold up. This is the Transmission put behind High Horsepower 454s and other engines making as much as 450 Horsepower in Corvettes. It has a Main Shaft that accepts Drive Shaft Yokes like the Turbo 400. They are about twice the size of a Muncie or Turbo 350 Yoke. This Super T-10 has Six Rings on the Input Shaft which helps figure the Low Gear Ratio. It is supposed to be in the 3