so I'm trying to build a conversion for my 2004 ford 6.0 I pan on coolant heat for hih, tank, and filter.looking for knowledege from anyone. New to this but eager to get started i think i have the heat and plumbing worked out my haze starts with switching and purge. does purge basicly clear the ip of svo and also return loop vs return to tank. Switching I'm the only one to drive my truck so manual switching is ok, 3 port 6 port help me out I want to get it right the 1st or 2nd time. temp to ip is 185 going to cut or does it need to be higher also presure to ip my deisle pump presure is 54 psi I asume I'll need to match that is that true or is grtting svo to ip the goal. well I want to say thanks in advance for any info provided