<<Granted, most all the externals are different, but the heads & block seem VERY similar.>>
Block interchanges:

A 91-96 Stealth SOHC
A 88 Galant
A 97-99 3000GT W/O turbo sohc
A 89-90 Sigma
B 92-96 Diamante SOHC
B fits A difference is B has knock sensor mounted in valley
Above from Hollander Interchange. Interchanging Stealth (which works for me).

Direct fit for 89 Raider
90-91 D-50
90-94 Mitsu P/U
89-94 Monty
89 Raider

Heads 89 Raider:
92-96 Diamante 92-96 SOHC
90-91 D-50
97-99 3000 GT SOHC W/O turbo
90-94 Mitsu P/U
89-94 Monty
89 Raider
91-96 Stealth SOHC

That all said, I pit the engine mounts, pan, oil pump/pickup from the raider onto the stealth engine.

Go mix & match thru all of that & build an engine.
Hollander is showing that Chrysler/Dodge blocks do not interchange, but may work.

By what I see, the oil filter is mounted on the passenger side & might be able to be blocked off & you might be able to remove/add plugs to make the Mitsu filter/pump work.

PM me for any questions....

Ed