The rear is stock, so I'm guessing 3.73 - will have to check some books when I get home. Can't find any online references with axle specs for 57 Chevrolets.
Not sure about the T5, expect that it has the center-mounted shifter. I don't recall there being an ID tag on it. I got it a couple years back in a trade from a guy who just had it rebuilt for a race car, but smashed up the car while the trans was still in the shop. I was going to put it in my F100, but went with a T18 instead. So now I have this T5 sitting in the corner of my shop, and a Chevy that needs a new tranny....
