Block revisions of the FSDE

MazdaSpeed626

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Mazda 626 1998 5spd 2.0l FSDE
Alright, since the FSDE has been around since 1993 in the ford probes, 626's, and mx-6's, has mazda made any revisions on the block at all?

I ask this cuz i want to buy a shortblock from a junkyard, machine it, rebuild it with new pistons/rods/bearings/etc and then boost it. that way when its all ready, i can just swap heads and drop it in. But. I don't wanna have to drop money on a fairly new protege block when i could get a block from a probe or 626.....so when did they make those revisions.....i've heard 1995....but i can't be sure.
 
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