Currently, I have a 3-speed stick in my 1969 396 chevelle. I want this car to get the quickest 1/4 mile speed possible, so I am trying to figure out what the best manual tranny is.... should I put in a muncie 4-speed? Corvette 6-speed? 5-speed?? I have no idea so somebody help me out. Also, I am planning on putting 3.73 gears in the rear.