I only want to address one question that you asked. If you are going to replace the cooling system hoses I would suggest doing them in silicon. The reason for this is that you will never have to do it again. Next time I do mine, that will be the way I do it. Except for the curved pieces of course, unless someone develops a suitable silicon replacement. I think Rob Grady was working on this at one time, but I am not totally positive. As for the other parts (otterstat, thermostat), treat them the same way you do the fan relay......if it ain't broke, don't fix it. Good luck. Regards, Darren Decker #5000