mine is 3/4 male NPT (pipe thread) use an10 fittings for the sleek install, or you can go with the more economical barbed fitings and hose clamps. The hose for an is offered by many companies, call up any local streetrod,. or custom car place/ fabricator/store adn they shoudl have one brand or another of an fittings and hoses for you to buy, let yoru fingers do the walking for price. one option is stainless steel braid, BUT it will act as a hack saw blade if it rubs on anything with vibration, so you got to hang it / sperate it correctly to prevent it sawing thru other stuff, one great option is the nylon braided. you want a thermostat, pick the one in the sandwich adaptor rather than a seperate unit, the main reson is cost, if you use a sperate unit, you will need to double the number of fittings you have and that cost money.
local vendor to me sells Fragola brand an fittings, so that is what i use. look them up on teh web, there are many other makers also, jegs and summit carry there brands also, they will send yo a free catolog also
good lucks!!!!!!!!