Tommy, That is a really nice set up. It is C4. The C4 is from 1984 - 96, The C5 and C6 run the same geometry and independent rear transaxle and began in 97. It is the same that GM is using today. I have C4 in some of my Dragons and it works great. See you at the track someday. Here is a picture of the C5/6 stuff in my Dragon chassis. I use it in my Cobra chassis too.
I don't know what type of rear end we are talking about in this thread. But, if it is an independent rear a partially broken or bad ujoint in an independent rear can make the car jump side ways under acceleration.