Chevy 194-292 L6 Pro Series Ready to Run Distributor

• Fits Chevy 1963+ inline-six 194, 230, 250, and 292 CID — not compatible with Stovebolt

• External coil required (35,000V+) — no ignition box needed, tach output cable included

• Tunable advance curve — 3 bushings, 4 springs, vacuum block-off plate included

• Fits Chevy II, Nova, Camaro, Chevelle, C10/K10, and GM inline-six truck applications

The TSP Pro Series Ready-to-Run Distributor for the Chevy late inline-six delivers the full Pro Series feature set — advance curve tunability, tachometer output, vacuum advance block-off plate, and an integrated ignition module requiring no external ignition box — for the Chevrolet 194 CID (3.2L), 230 CID (3.8L), 250 CID (4.1L), and 292 CID (4.8L) inline-six engines used in 1963 and later carbureted applications. Distributor rotation is clockwise.

Pro Series vs. HEI — Choosing the Right Late Inline-Six Distributor:
The TSP Late Inline-Six HEI (JM6523) and this Pro Series Ready-to-Run (JM7723) cover the same engines and vehicles. The HEI integrates the coil directly into the cap, connects to a single 12V wire. This Pro Series requires an external ignition coil (35,000V minimum, not included) but adds three advance bushings and four advance springs for mechanical advance curve tuning, a vacuum advance block-off plate for performance builds, and a tachometer output extension cable. 

This distributor fits the 1963-and-later inline-six only. It is not compatible with the early Stovebolt inline-six (216, 235, or 261 CID, 1962 and earlier). For Stovebolt applications, see the TSP Early Inline-Six HEI Distributor (JM6516). There is no Pro Series version currently available for the Stovebolt.

Why Choose the Pro Series Over the Late Inline-Six HEI?
The TSP Late Inline-Six HEI (JM6523) is the simpler option — integrated coil, single 12V wire, no external coil needed, lower cost. The Pro Series Ready-to-Run (this listing) is the step up for builders who need more control over the ignition system. The external coil setup lets you run a coil matched to your build. The advance tuning kit — three bushings and four advance springs — lets you dial in how timing advances across the RPM range rather than running a fixed factory-style curve. For a stock rebuild or basic ignition refresh on a Chevy II, Nova, or C10 truck with the inline-six, the HEI is the right call. For a modified inline-six build — a performance cam, higher compression, or aggressive carburetor — the Pro Series delivers the advance curve control that the HEI cannot.

Performance Benefit
The circuit board module and magnetic pickup trigger deliver precise, repeatable spark timing without the wear and drift of points-based ignition. Three advance bushings and four advance springs allow full adjustment of the mechanical advance curve — how quickly timing rises with RPM — which is particularly valuable on late inline-six builds running aftermarket camshafts or performance carburetors where a stock advance ramp undersells the engine's potential. A vacuum advance block-off plate is included for performance builds preferring full mechanical advance control only. A tachometer output extension cable simplifies aftermarket tach wiring.

This Distributor Fits 1963 and Later — Not Earlier
The early Chevrolet Stovebolt inline-six (216, 235, and 261 CID, 1962 and earlier) uses a completely different distributor architecture. This Pro Series unit fits the new-generation GM inline-six family introduced in 1963 — the 194, 230, 250, and 292 CID engines — only. For Stovebolt applications, see the TSP Early Inline-Six HEI Distributor (JM6516).

What engines does this distributor fit?
This distributor fits the 1963-and-later Chevrolet inline-six family—194 CID (3.2L), 230 CID (3.8L), 250 CID (4.1L), and 292 CID (4.8L)—in carbureted applications. It is not compatible with the early Stovebolt inline-six engines (216, 235, or 261 CID, 1962 and earlier). For Stovebolt applications, see the TSP Early Inline-Six HEI Distributor (JM6516).

What is the difference between this Pro Series distributor and the TSP Late Inline-Six HEI (JM6523)?
Both distributors fit the same engines and vehicles. The HEI distributor (JM6523) integrates the ignition coil into the distributor cap, requires only a single 12-volt switched power wire, and is the simpler, lower-cost option. This Pro Series Ready-to-Run distributor requires an external ignition coil rated at 35,000 volts or higher (not included) but adds three advance bushings, four advance springs, a vacuum advance block-off plate, and a tachometer output extension cable. Choose the HEI for a straightforward street or restoration upgrade. Choose the Pro Series for performance applications where advance curve tuning is important.

Why does the late inline-six Pro Series cost more than the HEI version?
The TSP Late Inline-Six HEI (JM6523) covers the same engine applications at a lower price because it is designed as a simple, self-contained ignition upgrade. This Pro Series version includes additional performance features, including an advance tuning kit, tachometer output cable, vacuum advance block-off plate, and the flexibility of using an external ignition coil. For most stock or restoration applications, the HEI is the best choice. For modified engines where ignition tuning is important, the Pro Series offers greater adjustability.

What vehicles does this distributor fit?
Supported applications include the Chevrolet Chevy II (1963–1967) with the 194 or 230 inline-six, Nova (1968–1979) with the 250 inline-six, Camaro (1967–1969) with the 230 or 250 inline-six, Chevelle (1964–1977) with the 250 inline-six, Impala, Bel Air, and Caprice (1963–1984) with the 250 inline-six, C10/K10 through C30/K30 trucks (1963–1987, carbureted) with the 250 or 292 inline-six, Blazer K5, Suburban, and equivalent GMC models equipped with carbureted 250 or 292 inline-six engines.

Can I tune the advance curve on this distributor?
Yes. Three advance bushings and four advance springs are included, allowing you to adjust how quickly mechanical advance comes in as engine RPM increases. For late inline-six engines equipped with aftermarket camshafts, higher compression, or performance carburetors, a properly tuned advance curve can significantly improve throttle response, drivability, and overall performance.

What is the vacuum advance block-off plate for?
The included black vacuum advance block-off plate allows you to disable the vacuum advance mechanism. This is commonly used on performance or race engines where ignition timing is controlled solely through the mechanical advance curve.

Does this distributor have a tachometer output?
Yes. A tachometer output extension cable is included, allowing you to connect an aftermarket electronic tachometer without requiring a separate signal adapter. This distributor does not include a mechanical tachometer drive.

Does this distributor include a coil?
No. This is a Ready-to-Run distributor that requires an external ignition coil rated at 35,000 volts or higher. The coil is not included and must be purchased separately.

Do I need an external ignition box?
No. The ignition module is integrated into the distributor. No external ignition box, CDI unit, points, or condenser is required.

What type of distributor gear is included?
This distributor includes a steel distributor gear. It is most compatible with cast iron hydraulic or solid flat tappet camshafts. For roller camshaft applications, consult your camshaft manufacturer for the recommended distributor gear material before installation.

Do I need to set ignition timing after installation?
Yes. Set base ignition timing with a timing light after installation. For most carbureted 250 CID applications, a starting point of 4–8 degrees BTDC at idle is a common reference, though optimal timing will vary depending on your engine combination, advance curve settings, and carburetor calibration.

Is this compatible with a 6-volt system or generator?
No. This distributor requires a 12-volt electrical system with a charging alternator. It is not compatible with 6-volt systems, generators, or ballast resistors.