Tail Light Bracket Question

I've cloned my 74 Dart Sport into a 70-71 Duster. I've installed the tail light panel, and I have tail lights and the MM1303, and MM1304 brackets from Classic to hold them. Now I see in their catalog these brackets, MM1554. This is a street/strip car with no intent on accurate restoration. I don't have another car to look at. Do I need the 1554's?
MM1303 - 1970-72 Mopar A-Body Tail Lamp Bracket; LH
MM1554 - 1970-76 A-Body Tail Lamp Reinforcement Brackets
Looking again, I see that the 1554's are listed for Demons and Dart Sports. So, I guess I answered my own question, but I'll post anyhow to be sure.