in looking for a place to mount a water temp probe I realized my radiator has a drain plug fitting on the bottom of one of the end tanks that could work.  that portion of the tank has cooled water about to return to the pump.   does it matter if I monitor the before or after radiator temps?  the engine sees both, right?   

same question as to the oil temp probe.  the stock oil cooler has a large fitting [plug?] underneath of one end tank, not sure of its usage.  also have an extra plug in the oil pan [out the side] which might work [?]  told that originally had a oil level sender unit in there.   kevin