http://www.f-body.org/tech/tech.htm#weight3rdTop speed might be 130 depending on the rear gear and if it can upshift into 4th. A 3.23 might be 130 in 3rd.
2.73 can do 150, don't ask how I know (IMG:
http://www.frrax.com/rrforum/style_emoticons/default/rolleyes.gif)