I recently swapped out the original 4 speed with granny gear for a T-5 World Class from an 86 Camaro with the biggest V-8 and put an S-10 shifter on it. The reason that I went with that T-5 WC was not that I needed a killer transmission, it was because it was a five speed with .63 overdrive.
My rear end is the original 4.56 and with the original transmission, I was screaming at 45 mph. Now I can cruise at 2200 rpm at 64 mph. I bought the transmission from Tom Langdon.
John
