Inboard Spring--from RMS

If you want a much bigger tire than what you got you will need too. Cant say for sure on Cudas, never had one. But I think with just mini tubs you can keep the rear seat and no panel mods should be needed. Think that is only with full wheel tubs. I am sure some one who has done a mini tub on there Cuda will chime in and give you the scoop.