The gen4/5 sump allows all the aspects listed above, crank angle sensor is great to allow for easy coil on pack COP upgrade and advancing ecu control on ignition (aftermarket ecu required), as well as the biggest aspect of utilising the gen4/5 oil pump that has a larger gator (15mm vs 13mm in Gen2/3) and runs the gen3/4/5 smaller 1 tooth less cog (runs the oil pump slightly faster), overall far greater oil supply available at pump. The pressure relief valve regulates actual oil pressure.
This is the Toyota design of gen4/5 for 3sgte (and can be used for a 5sgte build).

Before you jump on a 'buy it now' - lol - You need to determine why you are upgrading and what purpose you use the mr2 to determine whats the best solution and the answer maybe a gen3 sump or moroso sump (more oil at sump) or even stay with a gen2 sump. 
 
There are a combinations of solutions for gen2 3sgte block or late model 5s block and gen4/5 sump with gen 4/5 oil pump set up in regards to the oil cooler/filters;
Run the smaller n/a oil filter z386 at the stock position and run the larger z4xx turbo oil filter at the bottom location, or replacing the gen2 oil cooler with a gen3 oil cooler that has the block off plate on the oil cooler (custom HFHOE required), or running a late model 5s oil cooler (requires modification), or running a gen4/5 oil cooler (requires modification) at the stock gen2 position as it also has the cooler block off plate, or eliminating the stock gen2 oil filter position and running an external oil cooler.   
The gen2 motor with gen2 sump can be upgraded by a late 90s model 5s oil pump upgrade that allows you to keep the gen2 sump, and is the cheapest upgrade for more oil flow at pump. http://www.atsracing.com/Parts/Details/E-OILPUMP 
 
Google will provide further information or PM me and can share some pictures and info.

Probably a good this if the brakes aren't good lol 😋

Between having a baby and repairing a caravan I haven't had a lot of cash left over for my MR2, but I did get a fuel pressure gauge...
 

Had to get a new bung in the down pipe, as the one in it had the wideband sensor hitting a water pipe.
 
While it was out I decided to give it a ceramic coat:


 
And the new bung works great:

 
Now working out the wiring/mounting:

Really?
 
I was told by the guy I got it off that it was okay.