Yeah, Mike's got it nailed, Me being 15 know that, I like to go fast and, like that pedal all the way to the floor, the 283 would be a safe driver for a 16-18 year old, it would be safe pumping out approx up to 300 HP now, if ur gonna want to drive it, u could get the 400/TH400 and run a restrictor plate so, it would be restricted when ur kids drive it and, you could take the restrictor plate out when you want to drive it. Myself I know that I have to restrict myself so, I'm getting ither a '67 GMC truck with 4.56's and a granny tranny that, only has a top speed of approx 70 MPH or, a 1940 sumptin 4dr Chevy with stock drivetrain, that would go about 90 MPH top speed.