Modern Rodding Tech
InTheGarageMedia.com
1. Of course before any of the final finish could be applied the entire chassis was assembled, from fuel and brake lines to big items like engine and trans. Once all systems checked out it was disassembled for paint, polish, and plating.
By Gerry Burger
BUILDING A GREAT… HOT ROD ROLLER
The Sather Coupe Chassis is Ready
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uilding a hot rod involves decisions, lots of decisions. They range from wheels and tires to the myriad of possible body mods, paint colors, and then there is the whole group of decisions that define how your hot rod performs. If all of these decisions are made thoughtfully you end up with the perfect hot rod harmony.

The first decision for most of us is stock frame or aftermarket frame. That turned out to be a non-issue for Bill Sather as he began this build with just a steel ’34 Ford five-window coupe body. Since there was no original chassis aftermarket would supply the frame and since one very early decision was to have a BDS 6-71 blown, LS-family 427 between the rails the chassis would have to be stout. Understanding all these requirements the team at BBT Fabrications placed a call to Walden Speed Shop and had them build an all-new ’34 chassis with tubular crossmembers. Like the rest of this build the chassis is a blend of traditional hot rodding with the finest modern construction methods.

Continuing in the traditional vein, the front suspension consists of a buggy spring and dropped I-beam located with a set of hairpin radius rods. Shock brackets and shocks are from SO-CAL Speed Shop and every bit of the front suspension is either polished stainless or chrome plated so there is plenty of sparkle up front. Front brakes are yet another melding of traditional looks and modern safety. Inside the Walden Speed Shop Kinmont-inspired brakes you’ll find a set of Wilwood calipers bringing things to a halt.

Out back the tradition continues with a chrome-plated transverse spring mounted to a polished quick-change rear with a set of tube shocks putting a damper on things. Long rear radius rods locate the housing.

Power for the coupe comes in the form of an ’18, 427ci Chevrolet engine built by Texas Speed to accept the aforementioned fully polished BDS 6-71 Blower and Hilborn/Holley fuel injection. The engine is dressed with Billet Specialties–adapted, traditional-style, small-block valve covers, so at first glance you could be forgiven if you thought this was an early small-block motor. A Gearstar-modified 4L75E transmission passes the power to the rear wheels with a Lokar shifter selecting the gears. All this rolls around on a set of genuine magnesium Halibrand wheels. When it comes to traditional rolling stock you just can’t top a set of real Halibrands wrapped in Coker Tire Firestones.

So that’s a quick overview of the chassis and driveline that will reside under the Sather coupe. All of it is assembled and formed with the usual outrageous attention to detail team BBT puts into every build. This story is not particularly about how to build a great chassis, rather it is an illustration of making good decisions and assembling all the right pieces to provide the looks and performance desired. So, take a closer look at the photos and you are sure to find details that may help you when it comes time for you to make your own hot rod choices. In the end it’s up to you, hot rod harmony or maybe a song only you can sing.

Like so many world-class hot rods this chassis is almost too pretty to cover with a body
2. Like so many world-class hot rods this chassis is almost too pretty to cover with a body. The attention to detail and flawless finishes are everywhere on this hot rod platform.
body was placed on the chassis one last time to ensure no complications later in the build
3. It is also important to check the body fit to frame before painting anything. The body was placed on the chassis one last time to ensure no complications later in the build. Note this was done prior to final bodywork.
Elegant through simplicity, the motor mounts are just one example of the fine craftsmanship on the entire chassis.
4. Elegant through simplicity, the motor mounts are just one example of the fine craftsmanship on the entire chassis.
The Wilwood master cylinder mounts under the floor to maintain a clean firewall. Note the exhaust tubing is kept several inches away from the master cylinder. Brake fluid does not like heat.
5. The Wilwood master cylinder mounts under the floor to maintain a clean firewall. Note the exhaust tubing is kept several inches away from the master cylinder. Brake fluid does not like heat.
A view from the rear shows the Walden Speed Shop chassis is definitely up to the challenge of mega horsepower with a tubular centersection that is very stout. Long rear radius rods locate the quick-change rear.
6. A view from the rear shows the Walden Speed Shop chassis is definitely up to the challenge of mega horsepower with a tubular centersection that is very stout. Long rear radius rods locate the quick-change rear.
Polished stainless steel headers connect to a full stainless steel exhaust system.
7. Polished stainless steel headers connect to a full stainless steel exhaust system. A flex coupler allows some movement in the system as the engine torques; note the oxygen sensor port in the header collector for the EFI system.
Following the exhaust system to the rear of the car you can see the five different bends required to snake over the rear axle housing.
8. Following the exhaust system to the rear of the car you can see the five different bends required to snake over the rear axle housing. A coupler allows the exhaust system to be disassembled should the need arise.
A bushing isolates any vibration transfer to the chassis and by mounting the bracket parallel to the tubing the pipes cannot rotate.
9. Once again the bracketry is outstanding on the car. A bushing isolates any vibration transfer to the chassis and by mounting the bracket parallel to the tubing the pipes cannot rotate.
On the driver side the exhaust tube also had to be routed around the rear sway bar.
10. On the driver side the exhaust tube also had to be routed around the rear sway bar. Also note the piece of box tubing bolted to the shock absorber mounts. This ensures the chassis/rear axle is fixed at ride height so you can accurately locate the exhaust.
This overhead view illustrates the perfect placement of all components on the chassis. The Borla Pro XS stainless mufflers provide good flow and a proper performance sound.
11. This overhead view illustrates the perfect placement of all components on the chassis. The Borla Pro XS stainless mufflers provide good flow and a proper performance sound.
The chassis was rolled outside for one last photo shoot before disassembly.
12. The chassis was rolled outside for one last photo shoot before disassembly. Note the finish on the real magnesium Halibrand wheels and compare that to the finished chassis with the wheels polished.
LS-based 427 is topped with a Hilborn/Holley fuel injection unit squirting into a BDS 6-71 Blower while spent gases exit through Ultimate Headers
13. Looking more like a piece of jewelry than a powerplant approaching 800 hp, the LS-based 427 is topped with a Hilborn/Holley fuel injection unit squirting into a BDS 6-71 Blower while spent gases exit through Ultimate Headers. Billet Specialties adapters mount the early valve covers while a Powermaster starter combines with an Optima battery to spin the mill into action.
The Walden Speed Shop Kinmont-inspired brakes house modern-day Wilwood calipers for vintage style and modern efficiency.
14. All that horsepower requires a serious set of brakes. The Walden Speed Shop Kinmont-inspired brakes house modern-day Wilwood calipers for vintage style and modern efficiency. Ribbed Firestone rubber from Coker Tire wraps the original Halibrand magnesium wheels.
The chassis is painted, powerplant in position along with the Gearstar modified 4L75E transmission.
15. The chassis is painted, powerplant in position along with the Gearstar modified 4L75E transmission. The exhaust has been assembled; next comes front and rear suspension.
Sanitary is the word that best describes this rear suspension
16. Sanitary is the word that best describes this rear suspension. A polished quickie, with chrome-plated radius rods and sway bars, contrasts nicely with the flawless black paint.
Looking from the rear, the stainless exhaust has been polished and the welds were not ground for a mechanical feel.
17. Looking from the rear, the stainless exhaust has been polished and the welds were not ground for a mechanical feel. The chrome buggy spring keeps the traditional theme while the black tube shocks become nearly invisible.
Up front the dropped I-beam has felt the platers touch along with most of the front suspension components.
18. Up front the dropped I-beam has felt the platers touch along with most of the front suspension components. Now just imagine looking through the chopped windshield of a ’34 coupe at four traditional air scoops mounted atop a whirring BDS blower.
We couldn’t resist ending this story with a comparison photo from the rear.
19. We couldn’t resist ending this story with a comparison photo from the rear. With everything in finished bare metal, the Walden Speed Shop chassis looks like it is all business. Routing of brake and fuel lines was well thought out as was the exhaust system.
A set of big ol’ grooved ’Stones wrapped around 16-inch magnesium Halibrands dominate the finished rearview.
20. A set of big ol’ grooved ’Stones wrapped around 16-inch magnesium Halibrands dominate the finished rearview. The paint is flawless, as is the fit and finish of all pieces. Note the body welting is now in place. If you’re anxious to see the finished Sather coupe stay tuned, we’ll bring it your way soon.
BBT Fabrications
(217) 586-5699
bbtfabrications.com
Billet Specialties
(800) 245-5382
billetspecialties.com
Coker Tire
(866) 516-3215
cokertire.com
Gearstar Performance Transmissions
(330) 434-5216
gearstar.com
Lokar
(877) 469-7440
lokar.com
Powermaster Performance
(630) 957-4019
powermasterperformance.com
Optima Batteries
optimabatteries.com
Wilwood Disc Brakes
(805) 388-1188
wilwood.com
Modern Rodding
VOLUME 2 • ISSUE 14 • 2021