Thought I had some but can't find them right now. If you have all the correct clips, plastic pipes, and bulk hose the routing might be somewhat apparent as the clips that hold the hose in place slide onto the edges of the support structure along the rear underside of the hood, IIRC. From the Y pipe, near the left rear of the hood (underside) one hose goes back to the left squirter, another goes over to the right squirter.
No thread yet. Still sourcing new OEM parts which is the biggest challenge. We are starting with a great rig though. Super low miles, California only, 3x, white, etc... Will be a fully stock restoration