Oh, and if you can find a NDS truck, those fans are the rite size I think. Kind of a direct bolt in. I think you can also use the NBS rad with the fans and just swap all into your gmt400.I'm a certified welder myself, have a rig/mig setup here and been fabricating most of my life so I can do it but wanna easy setup lol. Ur setup is sweet tho! Would love to do something like that in mine, then I'd have to make everything else shiny to match it tho ! Basically and gm fan setup that'll fit my radiator and mock up sum mounts and be good. Will try and figure out the 2 speed things after the fact .