deluxe heater > the outer tube [fender side] comes from the pump fitting, the inside tube [toward engine] goes to the head [or thermostat housing]
standard heater > the top [higher] fitting comes from the pump, the lower fitting goes to the head

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics