So i blew out my rear freeze plug the other night and have decided to build my own coolant bypass. So far I have purchased a series 55 valve pre set to 30 psi from aquatrol and a billet freeze plug from EED. My ? is the freeze plug is drilled and tapped for a fitting should I bypass from the rear plug or plug it and bypass from the plug between 5 and 6 on the head? Also is it best to tap into the T-stat housing or the upper radiator hose? Thanks for any input.