I have had low oil pressure ever since I did the 3.1 swap and was scratching my head trying to figure out why when I realized that I had to use the oil pressure sending unit from the 3.1 cause the one from the 2.8 was to big and got in the way of the oil filter. Well the holes on the insides of the units are different sizes. For those of you that have done the 3.1 swap, where did you get adapters to get the correct pressure readings?

different cars, computers, engines, sending units = bad readings

One thing you could do is get the oil pressure adapter tube from a 2.8 that has air conditioning. That would put the oil pressure sensor near the battery, so that you could use the Fiero oil pressure adapter.

i did mine last year and used stock (air)oil tube&sender tube base hase a flared end so i just needed an adapter to block . LORDCO had mine.