I was going to install a conversion on my 6 a few years ago, and after reading all the information i would find, I read that the kit that you have to drill thru the body and use part of the body as a mounting point will start working on the body and eventually can crack your body pannels. and the other kits acts like a long lever on the mounting bracket and eventually rips the bracket loose, So in the end I just had my lever shocks rebuilt and stayed away from the tube conversions. plus the stiffer the shock the sooner your problems will begin
Hondo