Curios, all '84s had the 4-lug. G-bodies, Shelby Chargers, and I thought the GLH-T got the 5-lug starting in '85. I know I parted an '86 GLH and scarfed the 5-lug stuff for my '84 Charger.
Yes, the Turbos & GLH-S's got 5-lugs starting in '85, non-Turbo Shelbys & GLH stayed with 4-lug through '86....the last year 4-lugs were offered on the K-E-G bodies.