Sheldon, I have a core 2.6L from an 89 Mighty Max that could be available. Trip from NorCal may be $$.

Yes, oil pump driven from same chain.

1988 Mighty Max turbo 2.6 service body
1980 Power Wagon W400
Sundry Mitsubishi Montero Gen 1 parts, Gen 1 and Gen 2 Max parts
Parts vehicles: 89 LS Montero 4-door, 2002 Sport AWD
For Sale: #277 Montero