According to what I know about Huffy VIN numbers is the first 2 letters are "Huffy Corporation" and the
#4 would mean a 1984.
I ride the heck out of a 1988 Huffy Techtra Lite road bike and LOVE the ride! My Huffy actually came with alloy 27" Araya rims and I upgraded to alloy bars and Diacompe aero brake levers and Diacompe calipers.........