97 is a better case, better main control. You shouldn't need to change anything, MAYBE put the MLPS from the old on on the new one, but that is unlikely. Just need to remember to get the filter for the 96-97 tranny from here on out.
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