Overheating 350 - 1969 4wd K5 CST

[CJ5 Convert]

Well first there is no shroud so I know I need to find one that is long because my 350 is in the rear mount position and it has the short water pump. This site is freakin awesome I learned all of that here. ( I hope it's right) The thing is I don't know much about engines and am trying to learn but this engine puts of a lot of heat just sitting ther and ddriving around the block is rediculous. The radiator hasn't popped but i can feel the heat maybe it's just old. The guages don't work because of a wiring hack job. So I thought maybe I could get a t-stat and put it right on the block till i could get to the wiring. Also how can I tell if a water pump is bad or the fan clutch and where the heck is the fan clutch? Can anyone tell if this is a 3 core radiator I think it is?. How do I know where to start. I don't know if it's good or not but a lot of heat going into the heater hoses.

Thanks for any help I loaded a few pics. and can someone tell me what those two things are in the boxes on the where the water goes out. Thanks for any help, Over my head.