anyways... kinda lost focus on here... here is the deal. dual cooling lines coming from the pump. single inlet on the manifold. I do not want to drill and tap another inlet (really really dont want to unless i have to) have an ada girdled head (dual outlet) with pipe as stated above... suggestions on how to run plumbing?
If you don't want to set up the second cooling lines, you have 2 choices...
A) don't use the second fitting on the pump. Connect the second cooling fitting on the pump to the bilge Venturi on your steering nozzle. It will blast the water straight out the back. If your nozzle doesn't,t have one, connect it elsewhere. Or you can get a brass plug (threaded with a hex head) and plug the second fitting.
B) put a t inside you hull b/t the pump and the motor. Your 2 lines in will t to become a single line into your manifold.
Now that I've answered your questions, I'm going to give you my 2cp
Do it right, tap the manifold, run 2 lines from the pump and install a second pisser.
If you can afford a mag pump, you can afford a manifold tap.
There are cooling diagrams in the tech faqs section.