Figured I'd include this info here as well for those interested.

If you are interested in adding an oil pressure gauge and oil temp gauge, then the proper sandwich adapter is in the link.
Oil Filter Sender Adapter - 3/4 unf-16
The oil filter for the following vehicles all list the 3/4 - 16 thread. So the adapter should theoretically work assuming there is adequate room to install.

Just checked, and the same filter is used for:
Land Rover Defender 3.9 L 3947 CC V8 1993 - 1993
Land Rover Defender 3.9 L 3947 CC V8 1995 - 1995
Land Rover Defender 4.0 L 3950 CC V8 1997 - 1997
Land Rover Discovery 3.9 L 3947 CC V8 1994 - 1995
Land Rover Discovery 4.0 L 3950 CC V8 1996 - 2002
Land Rover Discovery 4.6 L 4554 CC V8 2003 - 2004
Land Rover Range Rover 3.9 L 3947 CC V8 1995 - 1995
Land Rover Range Rover 4.0 L 3950 CC V8 1995 - 2000
Land Rover Range Rover 4.6 L 4554 CC V8 1996 - 2002

So there you have it. Purchase and install at your own risk.

 

This adapter should also work for the MGB as well.

 

And a Morgan, but might not be a lot of those north of Ward Cove....

 

This has been added to the tech section so you can direct people over there if they need to know the adapter to use.

 

No Morgans at all. But there is a '79 Peugeot 504 diesel for $350...might pick it up just because I haven't had a French car in a while.

 

My wife rolled her eyes when I showed her this...

 

If you do run a direct reading type of guage, just be aware you could have a hell of an oil leak if the lines do fail!

 

My girlfriend rolls her eyes every time I show her something Rover related. Last time I was showing her the new LED turn signals she acted like her teeth were being pulled She's more into the adventure aspect.

 

as i think i pointed out in one of the other threads, the taller heavy duty filters fit with these adapters

 

If you route them carefully there's little risk of a leak. Even less if you use flexible metal line instead of the more common nylon.

They do need to be bled after install. Start the engine, crack the nut on the back of the gauge and wait until oil begins flow out.

I much prefer hydraulic and thermocouple gauges over electric, but others like electric more.