Thanks Chris, I was seriously debating whether or not to get that.
Good: Gets the sensor further away from the heat of the turbo potentially extending the life of it, ensures sufficient clearance for the sensor
Bad: Costs more mula, I would need to figure out a way to get a wrench down there (make or buy a crow's foot) to install the thing among the nest of hoses since I wouldn't be able to just use a deep socket for the plug/sensor, extra connections = extra potential for leaks, more tubing/wiring to route and mount creatively in a tight space
I think I'll take my chances with only the drilled/tapped galley plug for now. I spotted a blank factory galley plug on the top of the block near the turbo on the passenger's side that shouldn't be too difficult to get to with some extensions if I unclip one or two air hoses.
Regarding the OEM exhaust manifold heat shields, I might put them back on if I can find some new bolts that will fit - mine are horribly rusted, but the heat shields are in decent shape. Who knows, I might even get fancy and paint the heat shields and bolts with black high temp paint.
I thought about using the bung where the factory sensor plugs in, but:
1. I prefer to have a secondary low oil warning since it's already there - even though by the time that one comes on, it's probably too late
2. It would be good to have that in working order if I ever sell the car and remove the gauges
3. I don't want to mess with a T-fitting to keep both sensors in the same bung (again, more connections = greater potential for leaks)
4. I don't want to tear the stock gauge cluster apart just to remove a light bulb - believe it or not, there actually is a limit to the unnecessary work I'm willing to do
I really appreciate the info though.
Side note: is the double-thick gasket connecting the exhaust manifold to the up pipe worth getting, or is the regular thickness gasket good enough?