I was able to find the numbers on the bars and they are 778 and 779, so they are the .900 big block bars. I knew they car had the heavy duty suspension option, I'm just surprised that the big block sized ones is what they used. I do agree with your point of view that safer and predictable street driving and handling is more important than a few 100th s of a second for an e.t. once or twice a year if I'm lucky. As someone already stated though, is the difference from a 1.xx bar worth the swap? Do torsion bars lose their strength over time? Thanks for all the help