Full Custom Chassis Build
In Progress1973 Dodge Challenger
"Project Insidious" 🐍
Rescued from boxes of parts with no floor and no firewall — being reborn on a fully custom in-house tube chassis around a Gen 4 Viper V10. Some builds take time. This one is worth the wait.
Build Concept
The Challenger. Fully Realized. Finally.
This one arrived as half a body and several boxes of parts — someone had gutted it completely, cutting out the entire floor and firewall from the unibody. Most people would have walked away. DIRRTY CUSTOMS saw an opportunity.
With the unibody already gone, the decision was easy: build a proper tube chassis in-house and do it right. At the heart of the build is a 2009 Gen 4 Viper 8.4L V10 — one of the most characterful and capable American performance engines ever built. A custom machined adapter plate mates the Viper bellhousing to a C6 Corvette torque tube, which feeds back to the C6's rear-mounted transaxle combining transmission and differential in one unit. The result is a true mid-rear weight distribution in a classic Challenger body.
The rear seat is gone, replaced by custom pushrod-fed coilover suspension. Full Z06 big brakes at all four corners. AEM Infinity ECU handles engine management — chosen specifically because Holley's system can't accommodate the Gen 4 Viper's unique 10-cylinder ignition architecture. This is the right tool for the job, not a compromise.
Project Insidious has been taking the back burner to other builds for a while — hence the name. But make no mistake, this one is coming. And there's more to this build than what's on this page. Check back as it develops. 🐍
Build Details
Vehicle
1973 Dodge Challenger
Engine
2009 Gen 4 Viper 8.4L V10
Drivetrain
C6 Torque Tube & Transaxle
Chassis
Full Custom Tube — Built In-House
Status
In ProgressInterested?
Get a QuoteWhat Was Done
Key Modifications & Parts
Full Custom In-House Tube Chassis
Built entirely at DIRRTY CUSTOMS — designed from scratch around the Viper V10 and C6 transaxle layout. When the unibody is already gone, you build it right.
2009 Gen 4 Viper 8.4L V10
One of the most characterful and capable American performance engines ever built. Managed by AEM Infinity ECU — chosen specifically to handle the Gen 4 Viper's unique 10-cylinder ignition architecture.
Custom Machined Bellhousing Adapter
A purpose-machined adapter plate mates the Viper bellhousing to the C6 Corvette torque tube — a solution that didn't exist until DIRRTY CUSTOMS made it.
C6 Corvette Torque Tube & Transaxle
Rear-mounted transaxle combines transmission and differential in one unit — true mid-rear weight distribution in a classic Challenger body.
Custom Pushrod Coilover Suspension
Rear seat deleted in favor of custom pushrod-fed coilover suspension — race car geometry in a muscle car body.
Z06 Big Brake Kit — All Four Corners
Full Z06 big brake setup front and rear. Stopping power commensurate with a V10 in a Challenger body.
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