You could always swap a 1.8 BPT in our car. They seem to be alot more reliable than the FSDE.
1.8BP is the FE3s little brother. Not worth the swap just put rods in the FS. If you wanted reliable 400whp I think FE3 is the way to go.
You would need mounts, trans, axles, hubs etc. I see the motors go for $500-$1000. They are from oversees none are in North America from the factory.
Here is some information:
http://members.aol.com/solomiata/FE3.html
Here is a comparison of FE3 rods VS SR20DET rods.
http://memimage.cardomain.net/member_images/4/web/208000-208999/208651_75_full.jpg
fe3 left, sr right
best stock motor mazda ever made i thinks though the new mazdaspeed disi mzr may be better, it sure as **** aint $500-$1000.
http://www.cardomain.com/member_pag...images/4/web/208000-208999/208651_76_full.jpg
Not to mention you can use the 2.2 sohc crank for a cheap stroker job.