Never taken it to the track. Just street drove it with the 355. I might take it to the track one night to see what the 406 does. Friend of mine has a 55 chevy with a 355 in it to. He runs in the 7's at the local 1/8th mile track and I could keep up with him pretty well with my 355. From a stop he would get me because mine dont hook, but from a roll we pretty much stay side by side. He doesnt know about this 406 swap either. :lol: Hopefully this is a great improvement over the 355 I had and hopefully I can suprise him sometime. :wink: