oh, 4th, are you sure those are not 1/4 id lines? or is the vacuum hose for your cruise control really 3/4"?
I've got a 6gal tank mounted in the aluminum tool box cross the bed. Adjacent to it is the pump. 3/8ths ID line runs from there to the engine bay where at the side of the batt, it tee's into two 1/4" ID lines.
The CoolerMist controller is pretty-much the same but uses a steel tit. I got the boost reference signal from the wastegate supply line right off the compressor housing. I used run of the mill 1/4" ID fuel line (at that small of an ID, the tube is very strong).