Modern Rodding Feature

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high angle front quarter driver side view of a Metallic Mystic Brown ’69 Pontiac GTO parked in an alley beside a red brick building
This ’69 Pontiac GTO has all the Makings
By BRIAN BRENNAN Photography by John Jackson
B

y 1969 the Pontiac GTO was cemented into the muscle car history books. Some would say that it is the keynote factory hot rod that started it all, with the most famous of all magazine stories that appeared in the Mar. ’64 issue of Car & Driver. They intended to compare a Pontiac GTO to a Ferrari GTO. But alas, the gods conspired, and the head-to-head comparison never materialized. But C&D still managed to “compare” one against the other. (Do you know what GTO stands for? It’s an acronym for Gran Turismo Omologato, a classification term commonly used in sports car racing.)

view inside the ’69 GTO driver side window with a focus on the front seating, featuring brown- and cream-colored leather stitched bucket seats
close view of the ’69 GTO's gear shift
view inside the ’69 GTO rear passenger side window at the brown- and cream-colored leather stitched custom-built rear split bench/bucket combo seating

The ’69 GTO displayed in front of you, while beautifully built, immensely powerful, and an amazing performer, may not be as popular as the man who owns it. If I say Kevin Hart, this may strike a chord. Yes, that Kevin Hart, the world-class comedian and actor. Turns out he is no stranger to hot rods of all sorts. He isn’t averse to having some powerful ones, including a ’69 Road Runner, an ’87 Buick Grand National, a ’67 Mustang GT500E, and a ’69 Camaro. All of them can flatly get out of their way and pass you in the process. His ’70 Dodge Challenger, 1,000hp Hellephant, powered and built at Kindig It Design, took home the 2023 Triple Crown of Rodding Street Machine of the Year category. Dare we say this Mopar can get up and scoot! Well, his latest, this ’69 Pontiac GTO can stand on its own. Joining forces with Detroit Speed & Engineering (DSE), the result is an example of the stunning craftsmanship we have come to expect. The DSE crew responsible for this build include Jason Eads, Zach Arlen, David Hoff, Curtis Larsen, Bruce Datkuliak, James Seamans, and Nate Peterman along with local outside assistance from Michael Neighbors, Austin Moore, and Josh Smith.

Power for this GTO is nothing less than the now-discontinued but king-of-the-hill Chevrolet Performance dry-sump supercharged LT5 (6.2L or 376 cubes) used in the ’19 ZR1 Corvette. It was the most powerful Chevy V-8 produced at the time with 755 hp and 715 lb-ft out of the crate. The main focal point of the LT5 is the new R2650 supercharger, which is an exclusive accessory. It displaced 2.65 liters and produced 14 psi of boost. Compared to an LT4 engine that is about 4-1/2-psi more achieved at a slower max rotor speed of 15,860 rpm. Why slower? The slower rpm helps to keep the air charge cooler and cooler leads to more horsepower.

high angle view of the ’69 GTO's open trunk, below the California license plate reads: DROPPA
driver side profile of the metallic brown ’69 GTO parked against a brick building background
Regulating the LT5 is a modified GM ZR-1 ECM, Holley EFI plug wires, Hooker Blackheart headers with 1-7/8-inch primary tubes dumping into a custom 3-inch stainless steel exhaust system with a pair of MagnaFlow mufflers. Other engine accessories are a Holley mid-mount front accessory drive, a pair of ZR-1 fuel pumps, dual SPAL electric fans, and an Optima YellowTop battery now relocated to the trunk. The factory valve covers and a custom engine shroud were made in such a way to hide the PCV lines and the engine wiring harness. To this, a custom-fabricated intake (internal air cleaner) is also employed to keep this monster running.

The LT5 (PN 19417105) was intended to be used in front of a manual trans. In this case, the V-8 is backed up to a Bowler Performance T-56 Magnum six-speed. The 135-pound manual is capable of handling 1,250 lb-ft and runs a 2.29 First gear and a 0.67 Sixth gear. Other trans appointments include a Tilton clutch kit and Hurst shifter.

The ’69 GTO frame was retained but highly modified to accept its new performance life. The front of the frame was modified using a DSE X-Gen 595 front suspension module (track width of 59-1/2 inches) that is positioned with 2×4-inch framerail sections. Note the front module comes with its own upper and lower control arms, DSE rack-and-pinion steering, and DSE-“tuned” suspension geometry. In the back, a custom DSE QuadraLink rear suspension is positioned, thereby eliminating the original triangulated four-link with coil springs suspension and upgrading to a more modern adjustable coilover setup. This suspension also allows for much wider than factory wheels and tires. In the case of the Hart ’69 GTO, a DSE 9-inch rearend is used with 3.82 gears and a PDE driveshaft.

At the corners let us look at the shocks, braking, and wheel and tire combinations. The always-desirable DSE/JRi-tuned single-adjustable coilover shocks are used. They can be regulated between stiff to soft ride via a click-style adjuster while ride height is controlled by a spring preload. Braking contains monster Baer binders with 15-inch drilled-and-slotted rotors and six-piston XTR monoblock calipers with D1247 pads in the front and rear. Braking is brought to life through the operation of a DSE master cylinder and brake booster kit. Rolling stock consists of HRE Valkyrja wheels (part of the now closed-out Ringbrothers Collection), measuring 20×10 and 20×12 all with 5-on-4.75 bolt pattern. From here the rubber comes via Michelin Pilot Sport 4S (summertime performance tire), sized at 275/30ZR20, and Michelin Pilot Sport Cup (optimum dry surface tire) that measure 325/30ZR20.

close view of the ’69 GTO's boost gauge
Factory sheetmetal is retained throughout but there is a healthy dose of “cleanup” to this ’69 Pontiac GTO. Examples of some of the body mods include the moving forward of the hood scoops 2-1/2 inches to accommodate the required clearance for the supercharger. The bumpers, front and back, are tucked to improve lines and in front, a LeMans bumper is used to replace the Endura nose to alleviate warping. In 1968 and 1969 the LeMans was fitted with a chrome bumper as standard equipment with the option being a body-colored Endura bumper (urethane-molded component). “Down low” you will also see a modified lower valance and a custom “chin” spoiler. Also, take note that the LeMans bumper was retrofitted with GTO hideaway headlights that are now fitted with Holley’s RetroBright headlights. The hidden headlights were optional on the Judge model as well as the standard GTO. A little more on lighting as the front turn signal lenses are now custom. There are also recessed doors and trunk locks. A modified rear spoiler, allowing for better alignment with the rear quarter-panels, and a custom wiper cowl panel. Any good-looking hot rod should be “clean shaven,” so note the absence of the factory emblems and antenna. One accessory we find particularly cool is the 8,000-rpm hood-mounted tachometer—or so we thought! The factory tach was removed and has been replaced with a 15-pound boost gauge. While we don’t expect you to be able to read the writing on the gauge, as it is too small, if you could it says “Hartbeat.” Now that’s cool. From this point, the bodywork was handled at DSE while the Mercedes Metallic Mystic Brown color was supplied by Neighbors and Moore.
the ’69 GTO's engine
close up view of the custom adjusters on the ’69 GTO's steering column

Inside you can see that the factory interior is extensively modified featuring a cream leather-covered dashboard and to it a custom set of Classic Instruments was added. More of the brown- and cream-colored leather was stitched by Avant-Garde Design over the Recaro front buckets and the custom-built rear split bench/bucket combo. The headliner is a cream suede while the door and kick panels are more of the brown and cream color combo leather. The steering column comes by way of ididit and is enhanced with a Sparc Industries Truss (made to order) three-spoke leather-wrapped wheel. The custom center console houses the Hurst shifter as well as the power window auxiliary switches. Another modern-day “required” accessory is the Vintage Air Gen IV A/C system. It and all the GTO’s electrics are brought to “life” through a DSE-modified American Autowire harness by Eads.

If you made it to last year’s SEMA show and visited the Holley Performance Products booth you most likely saw Kevin’s ’69 GTO. If you didn’t, keep your eyes peeled as it is sure to make the rounds during this winter’s indoor season, followed by the summer’s outdoor car show events.

Modern Rodding
VOLUME 5 • ISSUE 42 • 2024