anyone ever uses a transistorized regulator like this?

[chewychevy67]

i am going to run a gm transisterized ignition system from the 60's on my truck so i am thinking i will need to run a transisterized regulator as well. these parts are all in the 67 truck repar manuals but are unclear on this. these are the only pic's i could find of the regulator i have on the net. now my question. does this regulator have to be grounded to the sheet metal? my points regulator has a ground wire but these pictures dont seem to show one. anyone with experience with these? would prefer to not burn anything out so i thought id ask here before taking a shot in the dark.