Well, the rig I'm building with the rear radiator started life as a Blazer frame with a tube cage in place of the body (rusted off the frame!). Its now a custom framed exo cage over a Samurai body with the Blazer and 3/4 ton drivetrain(TBI 350, turbo 350, 205, d44, 14 bolt) /forums/images/graemlins/cool.gif. I've added a FlowKooler water pump and new thermostat(180 f) with a C&R 18x28 al. radiator and the water refuses to flow from the upper hose in the rear at 220 engine temp. I'm gonna change the thermostat but I'm not sure what brand/type to run. I'm also in need of a fan unit to fit the radiator and cant afford a new unit, ANY IDEAS?