I don't know the brand but a 215/85/16 should be right at 30.4 inches tall.
As long as the Dodge wheel center holes fit the Chevy hub. I always get mixed up on the center hole thing on Chevy, Dodge and Ford 8 lug wheels. I've carried a Ford 16.5 wheel and tire off my mom's 77 F250 (that I drive all the time) on my 71 GMC 2500 and that works.
Tire size dot com has a tire size calculator
https://tiresize.com/calculator/ and click on the tire comparison calculator
https://tiresize.com/comparison/ and you can compare two tire sizes side by side. Pretty useful stuff when you are wanting to see the diameter and width of a tire you are thinking of running or want to compare two tires side by side. I did my 255/60/15 compared to a 255/35/20 yesterday when someone was asking what would fit under the rear of an AD and those tires are the same height and width with 5 inch different rims.
I'd say as long as you are happy with that tire we are happy.