Somebody makes headlight bulbs with built-in turn signals in the bottom part of the bulb housing so there is no seperate turn signal unit, you just connect your turn/park wires at the back of the bulb next to the main headlight connections. I just cant remember where I saw them. Sorry not more help.
Here. Try this - combo bulb


"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."

1957 GMC 150