I have the vortec motor, so I assume I need the bypass. The first photo has various connections marked A thru E.
Which is the best way to run the hoses? I need the bypass, does the bypass run enough water to power the heater? I have indicated this way in photo Option A.
Block of the current bypss hose at the manifold. Run the heater hose from the water pump and back to the radiator.
Block off currect bypass hose from Manifold. Instal new bypass as per manifold fitting instructions, by running short hose from C or D in first picture, to the waterpump E. Then run heater from manifold where temp sensor is at the moment, thru heater core, and back to radiator.
Bypass remains, and runs from the side of the manifold to the heater, and then return to the radiator.