Anyone know if this one will work? I dont have any info about what car it came off of.

It will work, you will need an 90 degree elbow for the Fiero Oil pressure sender to fit.

I don't think it works with a low-mount alternator tho...

------------------
6+ years on this same swap -- NO engine or transmission failures...

Custom GM OBD1 & OBD2 Tuning | Engine Conversions & more | www.gmtuners.com

If the 3800 you are wanting to put that adapter on did not come with that same type be careful in your choice of spring for the oil pressure regulator that slides into the timing cover where that piece mounts on. I learned this lesson the hard way.

The spring has to be the one designed for the adapter in the pic you posted. If you use a spring from a longer style adapter your oil pressure will not be regulated properly and there is a good chance the oil pressure will be so high it will push the rubber seal on the oil filter out of the way and leak from the filter area like crazy.

I swapped a 3800 from a 94 Lesabre to a 94 Regal and I had to change that adapter for the swap to work. Well I have never seen so much oil come out of a motor so fast. It turned out that I had used the oil pressure regulator spring from the longer adapter by mistake and I had a heck of a mess of oil all over my garage floor after only a few seconds of running the motor. I figured it out but it took some head scratching before I realized what the problem was. The oil pressure was so high it also pushed the O ring out of the body of the oil pressure sending unit. I have never seen that happen before.