I had a 70 Sanger flat. And what everyone is saying is true. Mine used to be an UBG. It ran 128 backin the day. I turned it into a river boat. I ran a chevy in the 90+ brackets and it was a fun boat. I loved the feeling of airing out the skeg and it running a little sideways. But if you let go of the wheel it would turn full lock in half a heart beat. No rocker and it rode like crap. Swallow tail plates and 12 degree box. All the wrong stuff. But in its day it was unbeatable. (ONDALAY-John Annons boat). But I just made it quicker not faster (Nitrous) for those 800-1000 ft river races and had a blast with it!