[sweetk30]

i got no idea what your asking for .

the headlight in the pic above is the std 2 headlight size and is 2 adjuster pin/screws and a spring . the lower area below it is the turn/marker lens unit and its 3-4 screws solid to the core support .

as said only the 81-82 had turn/marker in the bumper.

try re-wording or posting pics of what you wish to do and maybe we can point you in the right direction .

and what is this running light you keep talking about ? these trucks are old school and that term wasnt used on them .

and 81-up is 3 core supports only . to change the setup you need to change the core support and headlight bezel and parts . the grill center swaps unless its 89-91 swap there all there own and chevy is not swapable with gmc unless you swap all 3 grill/headlight pieces .
2 headlight like you posted the pic for .
4 headlight stacked and turn/marker in grill if not in 81-82 bumper .
89-91 4 headlight side by side .

this is what stuff i know of these . all might not be listed or 100% correct as i never played with 89-91 2 headlight setup stuff .