kel, I prefer the TCP equipment over the UP equipment but that is totally a basis from comparing the UP pictures to the TCP stuff that I have (I have all of the TCP stuff). I would say that most of the stuff that I have read about the TCP stuff on is fair (after all the ego and posturing is taken out of everyones comments). They are good bolt on parts (minor welding).
I do not think that the TCP or UP stuff will allow you to run wider wheels without other modifications to the car (fender lips and inner wheel tubs). If you minitub the rear I am sure that a 315 will fit. The TCP setup will only allow you to realize inboard space gains up to the stock frame rail position....to go farther inboard with the inner fender it seems that modifications to the TCP parts will be required in additions to frame rail mods.
As for other options there are the
Griggs Racing setups.