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Nice! I'm from the east myself and never knew of these until now. Thanks for the additional photos and info.

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Rifleman, thanks for posting those pictures. Very interesting. My Mack production numbers show that 12 MH 6122 were built between 1987 and 1990. Superdog posted in the other thread he knows where one is located. Rare dog.

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Thanks Rifleman for the info. I see the headlights are mounted in the bumper and not in the grille. Interesting...

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Thanks Rifleman for the info. I see the headlights are mounted in the bumper and not in the grille. Interesting...

They do seem a bit lower than a traditional MH, but I guess this was the best option to compensate for the additional height

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Great pictures, Steve!

Thanks for posting

Ron

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I just noticed, the bottom pic looks like it was taken at the Mack Engineering Center.

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The headlights had to go in the bumper to comply with DOT or highway something, could only be a certain height off the ground, and yes Ken, pics were taken at MEC. herd of a couple around but no leeds, Like to have one, maybe I could modify my MH

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The headlights had to go in the bumper to comply with DOT or highway something, could only be a certain height off the ground, and yes Ken, pics were taken at MEC. herd of a couple around but no leeds, Like to have one, maybe I could modify my MH

The center of the headlights have to be 54" or less so that is not the reason.

Nice custom frame jog. This does not look like the typical plates.

You could have Tulsa equipment build one for you

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My comment about the headlights was aimed (no pun) at the grille. I would like to know if the lower grille sections were "modified" or new moulds to replace the normal headlamp pieces.

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Looks like they might have trimmed the top piece and flipped it upside down?? Seems like the cheapest way out since there was such a limited production run.

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interesting,,,been out here 35 years,,never seen one...bob

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Okay girls and boys...here is what Dr. Don S at the Mack Museum has to say:

The UPS 4x4 MH tractors were built to be used to shuttle trailers over mountain passes such as Donner Pass on I-80 in California. Without doing a lot of research, I found 13 chassis record cards on two different GSO’s. The headlights were installed in the bumpers to comply with the 54” maximum height limitation. The normal grille openings for the headlights were filled with covers cut from a standard grille. You can see two of the cover attaching screws for the left cover panel on the MH612-003 photo.

Thanks for another GREAT job by Don and the Museum. :notworthy:

Excellent. Thanks for researching this.

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Having never seen one,and knowing nothing about these particular trucks,i was curious were these manual trans. or automatics? thanks for looking into these Ken,some very interesting trucks!.............................................Mark

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I always wanted to make my1989 MH612 4 wheel Dr. Now that I see the pictures I might just do it thanks for the inspiration.

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One Dog, I sent you a PM. Click on the red thingy on the top right that is on the envelope looking icon.

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