As one who has towed with a Montero, save your time and find a Valley hitch for a Gen 1 LWB. This has width to distribute side loads off the 4-bolt center mounts, much more stable. See pic.

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1987 Raider - Roxy
1988 Mighty Max 2.6L Turbo - Pearl
1997 Mountaineer V8 - Freddy
2000 Excursion V10 - Freya