1966-1967 Cadillac 429 Pro Series Ready to Run Distributor with Female Cap - Black

• Fits 1966–1967 Cadillac 429 V8 — female terminal cap, black, Pro Series

• Female cap terminals — verify plug wire terminal gender before ordering

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

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

The TSP Pro Series Ready-to-Run Distributor for the 1966–1967 Cadillac 429 V8 — Female Cap version — is a precision ignition upgrade for carbureted 429 CID (7.0L) Cadillac applications from the 1966 and 1967 model years. This unit is identical in function, specs, and included components to the male terminal version (JM7748R) with one critical distinction: this distributor features female terminal sockets on the cap rather than male terminal pins.

Terminal gender matters for plug wire compatibility. Female cap terminals accept spark plug wires with male pin-style boots. Male cap terminals accept wires with female socket-style boots. Before ordering, confirm whether your replacement or upgraded plug wire set uses male-pin boots — if so, this female cap version is the correct choice. If your plug wires use female socket boots, the male terminal version (JM7748R) is the correct choice. Mixing terminal genders requires adapters and is not recommended.

This is a specialized distributor for a specific two-year production window. Buyers with 1964–1965 Cadillac 429 applications should confirm compatibility with TSP before ordering, as the distributor architecture may differ between early and late 429 production years. For 1968 and later Cadillac applications, the TSP Cadillac 472/500 Pro Series distributor is the correct unit.

The Pro Series design uses an external ignition coil — giving you flexibility to run a coil matched to your build level. A minimum coil output of 35,000 volts is required — coil is not included. Three advance bushings and four advance springs are included for mechanical advance curve tuning. A vacuum advance block-off plate and tachometer output extension cable are also included.

Female Cap vs. Male Cap — Which Version Do You Need?
This listing (JM7748FBK) and the companion listing (JM7748R) are the same distributor in every functional respect — same engine fitment (1966–1967 Cadillac 429 CID), same specs, same included components, same price. The only difference is the terminal gender on the distributor cap. Female terminals are recessed sockets on the cap that accept male-pin spark plug wire boots. Male terminals are protruding pins that insert into female-socket wire boots. Verify your plug wire terminal gender before ordering — using the wrong version requires adapters or a different wire set.

If you are using the factory-style 1966–1967 Cadillac 429 spark plug wires or a replacement set that uses male-pin boots, this female cap version is the correct choice. If your wire set uses female-socket boots, order JM7748R instead.

A Specialized Distributor for the Final Cadillac 429 Era
The Cadillac 429 CID V8 was produced from 1964 through 1967, powering the full Cadillac lineup in its final production years before giving way to the all-new 472 CID V8 in 1968. This Pro Series distributor is specifically engineered for the 1966–1967 production window. Buyers with 1964–1965 Cadillac 429 applications should verify compatibility with TSP before ordering, as the distributor architecture may differ between early and late 429 production years.

Performance Benefit
The circuit board module and magnetic pickup trigger deliver precise, repeatable spark timing without the wear and drift inherent in aging points-based ignition systems. Three advance bushings and four advance springs allow full adjustment of the mechanical advance curve for your specific engine combination. A vacuum advance block-off plate is included for performance applications where full mechanical advance control is preferred. A tachometer output extension cable is included to simplify aftermarket tach wiring.

What is the difference between this distributor and the male terminal version (JM7748R)?
These two distributors are identical in every functional respect—same engine fitment, same specifications, same advance kit, same included components, and same price. The only difference is the terminal gender on the distributor cap. This listing (JM7748FBK) has female terminal sockets that accept male-pin spark plug wire boots. JM7748R has male terminal pins that insert into female-socket plug wire boots. Verify your plug wire terminal gender before ordering to ensure you select the correct version.

How do I know if I need the female cap or male cap version?
Check the spark plug wire boots where they connect to the distributor cap on your existing setup, or check the specifications of the replacement plug wire set you plan to use. If the wire boots have a male pin that inserts into the cap, you need the female cap version (this listing). If the wire boots have a female socket that slides over a pin on the cap, you need the male terminal version (JM7748R). If you're unsure, contact TSP with the plug wire set you are using and they can confirm the correct version for your application.

What engines and years does this distributor fit?
This distributor fits the 1966–1967 Cadillac 429 CID (7.0L) V8 in carbureted applications only. Supported vehicles include the Cadillac DeVille, Sedan de Ville, Coupe de Ville, Calais, Fleetwood, Fleetwood Brougham, Eldorado, Series 75 Limousine, and Commercial Chassis for the 1966 and 1967 model years.

Will this fit my 1964 or 1965 Cadillac with a 429 V8?
This distributor is confirmed for 1966–1967 Cadillac 429 applications only. There may be a distributor design difference between the 1964–1965 and 1966–1967 production years. Contact TSP directly to confirm compatibility for your specific 1964 or 1965 application before ordering.

I have a 1968 or later Cadillac — will this fit?
No. Cadillac introduced the all-new 472 CID V8 in 1968, replacing the 429. For 1968 and later Cadillac applications, the TSP Cadillac 472/500 Pro Series Ready-to-Run distributor is the correct unit.

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

Do I need an external ignition box or CDI unit?
No. The internal ignition module handles all ignition control. No external ignition box, CDI unit, points, or condenser is required.

What is included with this distributor?
This distributor ships with three advance bushings and four advance springs for mechanical advance curve tuning, a color-matched spark plug wire retainer with screws, a vacuum advance block-off plate in black, a power extension cable, and a tachometer output extension cable.

Can I tune the advance curve on this distributor?
Yes. Three advance bushings and four advance springs are included, allowing adjustment of how quickly the mechanical advance comes in with rising RPM. This is especially useful on 1966–1967 Cadillac 429 builds running aftermarket camshafts, higher compression, or performance carburetors.

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

Is this distributor 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.