Temp gauge sender location

^^This and be careful what you do, because the higher you put it in the system (like the rad hose/ tank) if you get a slow leak say, overnight, the gauge will never respond before the engine is overheated, because the sender probe will be high and dry

Also if you have tappings in the manifold you could use except too shallow, there are "folks" who make a once piece male x female pipe fitting, IE you screw it in and now it's taller. You might have to ream it to get the sender in, so it's a crap shoot