i have read a few places on the board about some 67-68's having a difference on the frame and that adapters are needed to acomodate a power steering gearbox, on my 68 powersteering box is shimmed out as a fix but is done really poorly, and whoever bolted it in got lazy and only botled half of it to the frame anyway

what i would like to know is there a kit or a method to give a 67-68 with a flat frame the ablity to have power steering safely, if there is where could i find such a kit or how would i make one?
thanks in advance
nate