115 sounds about right for my Dart. I need a 38 tooth speedo gear, now that I've replaced the 2.45 rear with a 3.55. With the 2.45, I figured like 150-160 top end. Still not interested in breaking 100. My friends RR with 3.55's and 15" wheels can do 120. Nailed the Dart coming out of a corner the other night and it got crazy squirrely. Had to back off. What a difference going from 2.45 to 3.55. Saved the little copper tag with 2.45 stamped on it.