This is a cool kit tho. It has remote oil filter as well. You could sell the remote filter mount and get a thermostatic adapter at racerpartswholesale.com or get an inline thermostat- which works much better than the built in one, at the same place. You have a killer Setrab core there- a premium core with any kit. You should check out the modshack article on oil coolers and see what I mean.
DIY: Oil Cooler (scratch built install, lottsa pics).....>. I pieced my whole system together and it works great! BTW, you would need to sell the 2 shorter lines and keep the 2 longer ones for your cooler if you just went with a thermostatic plate. Really nice stuff here...