I want to install a fwc system ,I have a ss heat exchanger and everything else is brand new,should I put in a thru-hull raw water supply ?It used to come thru the out drive,I also bought a 30 gpm 12 volt pump that I am thinking about installing on the fw side to supply the thermostat,because it is not going to be gravity fed,I also have a strainer for the raw water side to put in between the raw-water pump and the oil and power steering cooler,I bought some ceramic paint and I'm thinking about coating the three inch spacers inside and out,some input please