Sure. Ratios are as follows for the 200s
first 2.740
second 1.570
third 1.000
OD 0.670
The 200-4r is a strong one using hardened shafts and more gears in the planet sets. In alot of cases they are stronger than the 700r4. They will take more hp, but not quite the torque as a 700. Here are a few sites with info on them.
http://www.drwtransmission.com/thm_200-4r.htm
http://members.aol.com/powerrslid/thm2004r.html
http://www.transmissioncenter.net/highperflist.htm
http://www.vibratesoftware.com/html_...nsmissions.htm
http://www.gnttype.org/techarea/tran.../200rebld.html
And, yes, VIN Y is the 140 hp version. Its not that bad, especially if you put a decent rear ratio in it. I had one with the 200-4r and 2.56 rear. I couldn't use OD until about 80 or it would just cycle in and out helplessly. I could have really used some 3.08s or 3.42s in there.
Another nice thing (if you decide to change rear ratios) is that there are so many rear axles with so many ratios that you could probably hit any junkyard and get an entire 3.08 limited slip 8.5" 10-bolt from any taxi, cop car, or late-model wagon, and it will just bolt up with four bolts and a lift.