Chevy BB 348/409 V8 Pro Series Ready to Run Distributor

Pro Series Ready-to-Run Distributor for the Chevrolet W-Series Big Block 348 and 409 CID V8

The Chevrolet W-Series big block — produced from 1958 through 1965 in 348 and 409 CID displacements — is a distinct engine family with its own distributor requirements. This TSP Pro Series Ready-to-Run distributor is engineered specifically for the W-Series and is not interchangeable with later Mark IV big block applications (396, 402, 427, 454). If you're rebuilding a 348 or 409 in an Impala, Bel Air, Biscayne, or C-series truck, this is the correct distributor for your engine family.

The circuit board module with magnetic pick-up trigger replaces the aging contact-point ignition system found on these engines, eliminating the need for points, condensers, and the ongoing maintenance that comes with them. Mechanical and vacuum advance give you direct, tunable control over total advance curve — three interchangeable advance bushings and four springs are included so you can dial in the advance rate to suit your specific build, camshaft, and carburetor setup.

The ready-to-run design requires no external ignition control box. Connect power and ground, wire to an external coil, set base timing, and the system is operational. The machined aluminum housing and steel distributor gear are built for long-term durability. The steel gear is most compatible with cast iron hydraulic and solid flat-tappet camshafts — verify gear material compatibility with your camshaft manufacturer if your build uses a roller or specialty cam profile.

 

Applications
Designed exclusively for the Chevrolet W-Series Big Block V8 — 5.7L / 348 CID and 6.7L / 409 CID. Not compatible with Mark IV big block engines (396, 402, 427, 454). Confirmed common vehicle applications include Chevrolet Impala, Bel Air, Biscayne, C10, C20, and K10. Suited for carbureted street builds, restorations, and performance applications on W-Series equipped vehicles from the 1958–1965 production era.

COMPATIBLE WITH
CHEVROLET BIG BLOCK GEN. I (W) V8
• 5.7L / 348 in³
• 6.7L / 409 in³

NOTES
• Fits Chevrolet W-series big block engines only (348 and 409).
• The 409 was available in passenger cars only — not available in trucks.
• Not compatible with later Mark IV big block Chevy engines (396, 402, 427, 454).
• Designed for carbureted ignition systems only.
• Ready-to-run distributor with built-in ignition module — no external ignition box required.
• This distributor is designed for a 12 volt electrical system with an alternator and a performance ignition coil of 35,000 V or more. 
• It is not compatible with a generator and cannot be used with a ballast resistor.
• Distributor gear compatibility should be verified with camshaft material prior to installation.

COMMON VEHICLE APPLICATIONS
Chevrolet Impala / Impala SS (348, 1958–1961; 409, 1961–1965)
Chevrolet Bel Air (348, 1958–1961; 409, 1961–1965)
Chevrolet Biscayne / Delray (348, 1958–1961; 409, 1961–1965)
Chevrolet El Camino (348, 1959–1960)
Chevrolet Suburban (348, 1958–1961)
Chevrolet C10 / C20 / K10 (348 truck only, 1958–1964)

SPECIFICATIONS
Trigger Type: Circuit Board Module with Magnetic Pick-Up
Advance Type: Mechanical and Vacuum
Cap Color: Available in Black, Blue, Red
Terminal Gender: Male
Mechanical Tach Drive: No
Slip Collar: No / Fixed
Coil Type: No
Coil Output: External
Required Coil Output: 35,000+ V
Gear Material: Steel
Housing Material: Machined Aluminum
Ignition Box Required: No
Marine Use: No
Cylinders: 8
3 Bushings And 4 Springs for Mechanical Advance: Included
Color-Matched Spark Plug Wire Retainer with Screws: Included
Vacuum Advance Block-Off Plate (Black): Included
Power Extension Cable: Included
Tachometer Output Extension Cable: Included