FWIW, I have driven only one 1980, it had what I consider a full load of gear in it, and with me at 350 lbs and my friend at 200lbs or so, we were running 55mph. This was a flat stock boat with almost a full tank and livewells empty. My 2080 runs 64-68 depending on load. I think 54-58 on the 1980 is very reasonable. I drove that same 1980 without the second passenger and got almost 58mph out of it.