This will sound retarded, so please be patient...I have had a couple of Full Sails and I think "three sheets" applies....I don't know who drank these other four empties though

If you track the path of the water;
from the jetpump, water goes to the T-stat housing I will get to you, the T-stat housing has one inlet and three outlets. One 3/4" inlet, one 1 3/4" outlet and two 5/8" outlets (estimated sizes)..
The one large outlet will connect directly to the inlet on the engine mounted water pump (which I believe I also have)...That water pump will recirculate the water in the block until the thermostat opens, there is always some water bypassing the stat to keep the other two outlets feeding water (for the exhaust) which brings me to the two other outlets, these normally go to the exhaust logs, but with headers, one will go to the header control valve, the other to an overboard dump line....
This setup actually makes alternator brackets easier and belt geometry a little better...
I left my camera at a jobsite today, but I will have it tomorrow...Been busier than a three legged cat covering shit in sawdust during a tornado...

Oh yeah, call ya tomorrow.

GT