THE STORY
In June of 1971, the Chevelle
Malibu was purchased brand new with a heater delete at
Beyerl Chevrolet in Monroeville, PA. by a couple named
Gibson. After a year of driving, the wife passed away
with the odometer displaying 2060 miles. Mr. Gibson
parked the car in the garage where it stayed for 20
years. In 1991, a gentleman by the name of Cal
Nicholson, a GM technician who at the time was working
in the research and development section of the High
Performance Division of GM purchased the car at an
estate sale and the odometer had not budged. The car
sat for a period of time until Cal had developed a
scheme for the car to be a rolling test bed. GM
Motorsports had developed the splayed valve small block
for GTP racing. The development showed great promise in
the early nineties but soon after GM pulled out of the
GTP program, leaving the program without a core group of
customers. Enter Cal Nicholson, Cal began to examine
the possibility of a detuned version of the GTP motor
having potential on the street. Cal knew that he wanted
the Chevelle to be a rolling test bed for the engine at
which time the car was completely torn apart for the
rebuild. Cal initiated the build by accessing the
shelves of GM performance parts and other go fast parts
to create one of the hottest Resto-Mod Sleepers around
with no tubs, no billet and no roll cage but just a
powerful engine, Richmond 6 speed transmission and a
super duty suspension underneath a clean bold body.
ENGINE
The GTP motor produced well over
750 HP with a large torque curve to push the Chevy-Spice
and IMSA cars around the road courses they raced. The
GTP engine featured Chevy’s splayed valve heads that
hold huge 2.20/1.65 valves and have symmetrical intake
and exhaust ports. Cal had Katech Engineering assemble
a lightened steel Moldex 3.700 inch stroke crankshaft,
Carrillo rods and streetable 10.1 J.E. pistons. The
racing roller cam was replaced with a more street-wise
but equally trick Isky roller cam unit spinning on
needle bearings in the block. A Jessel timing belt and
Moroso external oil pump round out the short block. A
custom camshaft and intake are required for the splayed
valve block.
The splayed valve heads became
the big story with this engine. The splayed valve
cylinder head was developed by GM as a V6 head design to
be used in IMSA GTP racing but the rules changed
allowing V8 engines in the GTP. The heads angle the
intake valves 16 degrees to the deck surface, and splays
them 4 degrees. Exhaust valves are angled 11 degrees
and splayed 4 degrees as well. Essentially, the valve
configuration improves the alignment of valves with
their respective ports, utilizing the valves with their
respective ports and greatly improving the air flow.
These splayed valve heads can be purchased BUT YES A BUT
the splayed valve cylinder heads on the Chevelle are
proto type created by Cal Nicholson for street use. I
spoke with Cal about a year after purchasing the car and
he advised me that there are only two sets of the proto
type heads in existence with one set on the Chevelle and
the other in his possession. The GM heads were fully
ported by Diamond Racing Engines and fitted with
titanium 2.12 inch intake and 1.62 inch exhaust valves,
Isky triple springs, Jessel roller rockers, and Del West
titanium retainers for valvetrain strength. The valve
covers were custom fabricated by SB2 complete with
oilers. Cal had Hogan Sheetmetal custom fabricate a
race bred all aluminum intake to fit the block and to
mount the 830 double pumper Holley prepared by the Carb
Shop. The 830 Holley is fed by a Mallory pump using
finelines stainless steel lines. The GTP engine is not
set up for a wet sump so Cal designed and had a custom
dry sump fabricated. A Stock Car Products single stage
pump draws from a Moroso 8 quart pan. Cal maintained
the racing theme with CV products style NASCAR pulleys
driving all the accessories including a power steering
pump reworked by Street Manufacturing and a Stewart
water pump with a Griffin aluminum radiator. Other
engine goodies include an ATI balancer, MSD ignition
components light the fire GM Motorsports plug wires and
AC Delco racing spark plugs continue the NASCAR theme.
EXHAUST
Jon Little Race Car Engineering
fabricated and built the 2in. headers that dump into a
three inch exhaust system built by Flowmaster all of
which were jet hot coated.
TRANSMISSION
With the engine oozing race
technology, Cal knew he needed something strong to back
up the horsepower so he added a Richmond six-speed
transmission with a Centerforce clutch that is
controlled by a Long Shifter. The stock rear was
replaced with a custom fabricated 9 inch rear custom
fabricated by Moser Engineering with a custom fabricated
Strange Engineering 12 bolt style center section.
SUSPENSION
Cal had the suspension rebuilt
with the front suspension built from B body spindles and
tubular A-arms. Hotchkis suspension parts and Koni
shocks were used front and rear to have the Chevelle
handle perfectly with all of the power. Cal added Baer
Racing 12 and 13 inch disc brakes with 1996 Corvette
17inch Grand Sport wheels that Vaughn Engineering
modified the offset for the wheels to fit the Chevelle
and had them spinning on Z rated BF Goodrich 255/50-17.
BODY/INTERIOR
Cal wanted to leave the interior
stock in true sleeper form. He had Heagy Upholstery in
York, Pennsylvania replace the interior GM stock and he
kept the stock steering wheel and radio. The paint was
stripped down to the factory primer and the wheel well
and rocker panel moldings were removed and Cal had
Hanover Auto Craft spray the Chevelle in an original
shade of PPG blue metallic lacquer. The only
modification to the interior is the GM Auto Tech meter
and gauges.
SUMMARY
As you have read, there are
several one off features that Cal included in the build
of this car. Cal Nicholson was a visionary car builder
who was part of the team that developed the Zo6
Corvette, he developed the first big block for GM the
502 and I have other information concerning and
illustrating his expertise. As the car sits now, it has
only 3500 ORIGINAL MILES with about 1400 miles since the
build was completed. I am the third owner including Cal
and the car has been in my possession for 19 years. It
has not been raced nor has it been exposed to inclement
weather. The car is started and driven short distances
occasionally after which it is covered and stored in a
bubble that circulates air 24x7. I have documentation
for the mileage to include the magazines which featured
the car, the dyno sheets from Katech Motors, a notarized
paper from the original owner documenting the mileage, a
copy of the original Pennsylvania title and other
papers. The block does have a bowtie stamp. A brief
note about Katech motors located outside of Detroit,
Michigan. They build motors and other parts for Indy
cars, 24 hours LeManns, NASCAR, and many other circuits.
In closing, it is time for
someone else to own this very special car that in my
humble opinion cannot be duplicated. I am receptive to
negotiating with a legitimate serious buyer. I can
provide more detailed photos upon request.
Opportunity price for this rare breed car
$79,000.00
Car located in VA.
1.305.412.5000 or email
rick@transamflorida.com
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