So I did some research and it turns out in 1980, a federal legislation was passed that required all auto manufacturers to reduce the speedo to 85mph max in an attempt to conserve energy and slow everyone down during the energy crisis (even though most cars could go much faster). Ronald Reagan...
I've driven my square as a daily driver for a few years now since highschool, and my route to my new college takes me on an interstate where cars are whizzing by at 70+. Can these old trucks handle the interstate? Mines an '87, so it has the TBI 350. I've been on the interstate a few times...