I could be over thinking the placement of the pressure relief sender.. but frontside/Pulley side seems a little better.. as the flywheel side would and again I am just spitballing here is after oil cooler oil..
I assume what kind of full flow/oil cooler setup would fall in the same catagory if you ran a filter then cooler then back to the case.. that oil would be way cooler than that -that is the sump..
Of course.. what is the general idea? oil temp on the HOT side of the oil or the cool side?
or if you know your car runs well maybe just an idea of seeing things get out of hand is what you really are watching? Sorta Like my balance scale.. I could somewhat careless if it is accurate.. I really only care if it is consistant -that is the important factor.
I think also engine health and state of tune would really be better watched at the head(S) both seperately.. or better yet at the exhuast ports each one of them..
that would tell you way more than anything else.. I say run four temp gauges and four 02 sensors add two oil temps on both relief plugs ,don't forget a few pressure guages.. one just out of the pump and one in the stock location and and and..
Or just an idiot light unit with the dipstick unit for temp. ????
of course I am just kidding about everything.. but did wonder which location is a clear picture location for the relief unit.. (with wiring not a factor)