Cat, I think you are maybe getting your blocks ID's confused, your old block which it sounds like is being re-built is an EJ20 along with everything WRX pre 99 or 00, the later blocks with the offset manifold bolts were EJ205 = WRX and EJ207 = STI, these blocks came out in either 99 or 00...............therefore your old block is actually an EJ20 just to stop any confusion.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.