I am pretty sure that yours is an 8 on 6.5 and so was the older truck (and almost all 3/4-1 ton Dodge, Chevy, etc).
I was helping a co-worker look for a wheel for his 72 3/4 ton E series van, and I think he ended up finding a 2004 steel wheel/tire setup, but I don't know for sure.
97 Mark VIII LSC/Silver/Gray leather
97 Cougar 4.6 Sport/White Opalescent Tricoat Metallic /Gray leather down but not out?
89 Cougar LS 3.8/Oxford White/Gray velour/HG need replaced AGAIN
00 Grand Marquis LS/Vibrant White/Gray velour
63 Falcon 302/black and rust/shed isn't moving
82 F-150/Oxford White/dumb VV carb doesn't pass emissions