HRD my 92 dakota has 8.25 with 3.55. Don't know what axle is under yours. That 2002 RT though will have 9.25 rear though and likely 3.92 gears.

If it were me I would start out by running a taller tire to see where you like the rpms then possibly do a gear swap later. Lots easier to swap a couple used tires on than make a mistake on the gear choice.

I ran a 31/10.5/15 tire on my 92 dak 2wd fit fine in the rear, slight scrub at full lock on front. The tall tire made it great as an interstate cruiser.