Bright Red 1983 Mustang GLX convertible. The GLX was the base level convertible for 1983 which came with the 3.8 liter, 2 barrel 6 cylinder engine originally rated at 105hp (at 4000rpm). The GLX model was between the base model or LX and GT. Only 1001 GT convertibles where built in 1983 with 8 of them ordered in Canada. See our 1983 Mustang data explorer for more information.