Installed coolant pipes that run from the engine bay to the rear-mounted radiator inside the boxed frame.
Schedule 80 pipe. Bent & mocked in place with tabs & turnouts. Removed and welded. Ran bead around turnout for hose mounting.
Primed back of pipe & inside of lower frame rails where pipes are mounted.
Reinstalled and welded into frame.
Next is the rear crossmember and boxing plates.