I daily drove my 66/80 without a problem. Towing would get warm but the spool really wasnt bad. Ihave a 76.6 on there now and its tough to drive haha. 1300 degress going up hills 1100 cruising, but i dont have a cam just a ported manifold. I only drive it to the shop and to pulls though. Towing would be impossible unless its a log splitter or something tiny like that.