Rear Trailing Arms

[oval55]

Questions on the install. Maybe I have the wrong arms, but it is not a simple bolt on as I read it is. The spring plates seem to be a challange because they are a completely different bolt pattern, does the plate have to be reworked to attach. These are turbo arms onto a irs pan. Even the front pivot mount is not the same, different size of bushings??? Any help would be appreciated, Darren