Super Jet Yet another "Dual Cooling" question

Alright, here it goes, again.

I have a 94 sj 61x with carbon reeds, mod b pipe, stage 3 porting, and a 175 psi pro tec head, maybe a lightened flywheel, not sure. It is currently running single cooling, and I am thinking about tapping the pump for dual cooling. Do I need dual cooling? If I do, do I tap the pump and run the extra line to the pipe so that the engine and the pipe are on two separate circuits, or do I tap the manifold as well and run both lines to the manifold and then run a line off the head to the pipe?

My water temps are around 65-75 degrees and I ride salt, if that matters.
 
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