I'm looking for more power for work-like activities like trailer-pulling and snowplowing. I thought maybe the Montero gen-1 V6 may bolt up, yes? I'm not afraid to get dirty, but it is my only vehicle right now. I like this little truck and I'd rather work it than get a small pickup or something. Plus it's been in the family since day-one. So, are there any relatively painless power upgrades? (it's got 127xxx miles. all original, getting 17.75mpg)

87 Dodge Raider 5sp 2.6l no jet valves, Tuffpan
OME Dakar leaf springs + T-bar crank + 2" body lift (4" lift).
5500lb winch, Starion alternator, grp31 marine bat'
OBA (stock AC compressor)
33x12.5x15 Baja Claws or Wintermark extra load 235/75/15 M/S