fe3tcourier
+1y
the bellhousing from the 929 v6 will let the J series hang off of a b2600 gearbox. the v6 in the probe was some crappy american one, vulcan or something? you can get a 929 jap spec 3.0v6 with dohc heads, that will blow away our fe3s easy. sumps are a non issue, some sheet metal and the same mig that you need to make the engine mounts will do it. using the ecu from the donor car is an option (a random ecu is not a (good) option). megasquirt or other standalone is also a good choice. ms can be on the car for well less than 500us dollars.
if you dont go 929 dohc, then its a significant hassle for not that much more than the 2.6.
those are my thoughts anyway.