It is actually a 3.07. I've explained the T5 ratios here many times before, but here we go again.
The OEM overall starting line ratio in the 1952 pickup was 12.08 (2.94 x 4.11). If you choose a T5 with the ratio chain which starts with 4.03 (first gear) and ends in 5th with .86, everything will be Jake. First gear starting line ratio in that case will be 3.07 x 4.03 or 12.37...a mere shade more oomph per rpm than you'd get with 12.08 but not enough to discuss. Then when you get to 4th gear, the 3.07 v the 4.11 will give you a 25% advantage by dropping to 3.07 (1:1). And then when you shift into 5th, you will have 3.07 x .86 or 2.64. If you had a 3 speed with overdrive and a 4.11 rear (which was what GM commonly set up), your overall ratio in 3rd and overdrive would be .7 x 4.11 or 2.87. But I use 15 inch wheels and my tire diameter is smaller as a result, so divide my 2.64 by .94 and you get 2.81 which is virtually the same as 2.87. So as I've said before, I think I have about all the advantage one could get.
