Listen to casey, i built my rear mount after his and it works great, i daily drive it too on 10lbs. Use stock manifolds (i ported mine quite a bit though) and make sure you keep your y-pipe pipping size down to 2.5" like casey's or your first gear will not be fun lol. Use a dual 2.5" in to a 3" in to the turbo also. I'm running a JGS 400 wastegate with no issues at all. I had my cam for my built 370 speced by patg/eps too although i dont have the motor in the truck yet. Not to sure what casey is running now but i have the exa oil return pump and i bought a back up for long trips lol, its worked pretty well, i tried to buy the weldon return bump but it was back ordered like 4 monthes from weldon. When i started i kept my PS long tube headers and had a 3" into a 3 1/2" y pipe (not recomended by casey lol but im stuborn!) and it didn't work out to well lol.
07 4WD SCSB, LQ9/LS3 w/LS7 cam, LS3 intake,built 4l80e conversion,custom rear mounted TC78 turbo setup, ported exh. manifolds, devils own meth kit, WTA intercooler, aeromotive f-pump,True Trac, stock 3:42's, "new design" gray 20" american racing torque thrust ST's, 3/4" drop kit, painted grille, hids, welded roll pan, iss wing, Factory ss front bumper, TBSS SW, custom pioneer/infinity system with 10" JL sub