A GMC motorhome renovation

A GMC motorhome renovation
A GMC motorhome
Written by Todd Moning
Acting on a long-held crush, an FMCA member restores a 1973 classic.
Daniel Prigmore says of his restored GMC Land
Yacht: ''I believe there are things that you can do
really, really right that are very unique.''
He admired her when he was a young man but never asked her out. Over the years she
blossomed and found many suitors.
Meanwhile, he flourished professionally as a Boston-based real estate counselor. Approaching
retirement, he restored a 1930 96-foot motor yacht and cruised more than 30,000 miles. Oh, the
adventures he had … Seattle to Alaska … Venezuela to the Canadian Maritimes ….
After six years of ocean voyages, he decided to look for a land vessel so he could explore the
coasts and interior of the United States in more detail.
Searching the Internet for motorhomes for sale, he quickly discovered that the object of his
unrequited admiration had maintained its allure, more than 35 years after he first laid eyes on
her. Yes, the only motorhome that truly mattered to Daniel Prigmore was the one made by
General Motors Corp.
“I’ve known about the GMCs since the 1970s,” said Prigmore, an FMCA member who is now
retired and living in Coconut Grove, Fla. “They were always the most pleasing to my eye.”
With its low-profile design, angled windshield and tandem rear wheels, the sleek GMC
motorhome had a distinct visual appeal. But this front-wheel-drive vehicle also was known for
its maneuverability, comfortable ride and deceptive power. Models sold for $35,000 to more than
$40,000 by 1978, the final year of production.
The heart grows fonder
Prigmore still carried a torch for the GMC because it met all of his criteria for a motorhome: “It
had to be small enough to fit in the campgrounds of the national parks,” he said. “Not too tall
that it wouldn’t fit under the porte-cochere of every five-star hotel we went by. The interior and
exterior had to be pleasing and yacht-grade quality. And it had to have performance.”
In 2007 Prigmore found just such a coach, a 1978 GMC Birchaven. He bought it for $15,000,
intending to do a massive restoration/renovation/conversion. “That coach was all original; in fact
there was nothing wrong with it, so it seemed a shame to tear it apart. So I went and found
another one.”
His new flame would be a 23-foot 1973 GMC Land Yacht that he bought from a private owner
in Wisconsin, for about $10,000.
The previous owner had removed the interior and had started body and mechanical work with the
intention of doing a full restoration, Prigmore said. “Essentially his attention turned to other
things, so he was no longer interested in finishing it.”
Like any successful relationship, the Prigmore-Land Yacht bond would require commitment –two years and half a million dollars, to be precise.
Restoring it was “a massive project,” Prigmore said. “I did all of the design work and
specifications, and then found superb craftsmen to carry out my plans.”
The GMC Land Yacht's gutted interior prior to
Two teams worked on the Land Yacht -- a
mechanical team and a finishing team. “My
thinking was that it would get all of the
performance upgrades that people have dreamed
up over the years. Engineers loved the GMC.
There have been more tweaks to these vehicles
than imaginable.”
Mechanical updrades
Lee Harrison of IDEN Corp, Woodridge, Va., handled the mechanical side, Prigmore said. “He
primarily builds aftermarket parts for GMCs. He’s been doing it for 25 years and he occasionally
takes on a works project.”
Harrison rebuilt the Land Yacht’s 265-horsepower GM 455-cubic-inch V-8 engine. The engine
was converted to fuel injection and returned as closely as possible to factory specifications.
Harrison rebuilt the three-speed automatic transmission and equipped the coach with duel air
bags and four-wheel disc brakes. He upgraded the alternator, air conditioner and Dana air
compressor and replaced wiring, brake lines, air lines, etc.
Additional upgrades: a 40-gallon fresh water tank, a 40-gallon waste water tank and two new
aluminum 35-gallon fuel tanks.
Finishing touches
The body work, interior work and exterior painting were completed by Fairhaven Shipyard in
Fairhaven, Mass., which traditionally performs such work on yachts and commercial boats.
“I can tell you, Fairhaven Shipyard has never done a motorhome before,” Prigmore said. “But
they had done a significant amount of work on my boats, so that’s how I knew the quality of
their fiberglass work, their paint work and woodwork.”
All of the interior woodwork and cabinetry is custom made using foam core plywood and solid
stock. The cabinets and paneling are cherry wood with 16 coats of varnish.
Interior modifications
Custom cabinetry and woodwork give the Land
Yacht interior a classy look.
Prigmore, who is not married, said the Land
Yacht is designed as the ultimate couples
machine. “It’s not designed to carry four or six
family members.”
The original GMC was offered in two models -- a
23-footer and a 26-footer -- and more than 30
floor plans. The design had no designated
bedroom areas; all beds were converted from seating areas when needed.
Prigmore’s remodeled Land Yacht has a mid-coach dinette that converts to a bed, but the rear is
essentially a queen bed.
“The way this coach had been set up, the rear was a settee arrangement convertible to a bed. By
the time you get done with all of the mechanisms of that, there isn’t a lot of space. But by going
to a platform back there, I gain all the space under that platform.”
In that space he put in a 5.5-kilowatt Onan generator and a storage compartment that is
accessible from outside the coach.
In the bathroom, he managed to fit in a full-size separate shower, “which was the real trick in a
23-footer, he said.
Besides the full-size shower, one of Prigmore’s favorite features is in the driver’s area. “We
moved the passenger seat inboard and back, which allowed us to build a full navigation table in
front of it.”
‘A 10-year adventure’
Prigmore has put approximately 6,000 shakedown miles on his Land Yacht, averaging 8 to 10
miles per gallon.
“I expect this to be a 10-year adventure that’s probably eight weeks a year. I’ll use the
motorhome mostly in the spring and fall months.”
He won’t be alone. FMCA has more than 20 GMC chapters composed of proud owners who
continue to tinker with and enjoy this ageless classic.
Prigmore understands the GMC fervor, and why so many remodeled and well-equipped GMCs
are still on the road.
“There is a lot of aftermarket support for the vehicle. Between Cinnabar and guys like Lee
Harrison, and if you go through the RV clubs, you’ll find many original parts and upgrades
available. So it’s not like owning an orphan.”
Cinnabar Engineering, in Sandusky, Mich., manufactures and distributes original GMC
Motorhome parts.
‘Very unique’
The navigation table in the driver's area is a handy
The typical GMC Motorhome today costs $15,000
to $25,000 to buy. Nicely restored models, like
Prigmore’s, can cost much more. “There are some
people who have put six figures and above into
them, and there’s not a good history on recovery
of that,” Prigmore said.
“I had a 1930 motor yacht of some 96 feet and we
put 34,000 man hours into the restoration of that boat,” he continued. “But I recovered my
capital when I sold it six years later. I believe there are things that you can do really, really right
that are very unique.
“Whether I ever get any part of my money back out of my GMC, I won’t know until I know. But
if you look at what people spend for these ultra-luxury motorhomes, what I’ve put in to my GMC
is comparable.”
One thing’s for sure: Daniel Prigmore will never be one of those people who lament over “the
one that got away.”
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