75' with a 5wt 8.5ft is very far and to hit that distance in every cast makes it much farther. When I started, I practiced my 5wt 8'6" BPS Seventy Two accuracy and distance using a heavier and wind resistance practice fly. The result was more than I had expected, but I would go to a much longer rod and faster rod to make my life easier if I were you.
Or get a switch rod.
BEWARE...Once you switched, you can't switch back. :
and NO, I am not an expert, I just think like one.