Chevy 1987-1997 V8 (305-454) EFI Distributor

• Direct-replacement EFI distributorfor 1987–1995 Chevy/GMC V8 trucks, vans, and SUVs — no ignition box required

• Magnetic pick-up with computer-controlled advance — retains full factory ECM timing integration on non-Vortec applications

• Fits SBC Gen. I (305, 350) and Mark IV/Gen. V BBC (454) — male terminal

• Not for Vortec applications — designed for TBI and TPI EFI systems; 1996–1997 use limited to one-ton G and P series vans only

Direct-Replacement EFI Distributor for 1987–1995 Chevrolet and GMC V8 Trucks, Vans, and SUVs

If your 1987–1995 Chevrolet or GMC C/K truck, Suburban, or full-size van is experiencing ignition misfires, erratic timing, or hard starts on a 305, 350, or 454 V8 EFI engine, a failing distributor is one of the most common causes on these platforms. This TSP distributor is engineered as a direct-replacement unit for the factory computer-controlled distributor used in GM's TBI and TPI EFI V8 applications from 1987 through 1995 — restoring accurate ECM signal control and reliable spark delivery without reprogramming or additional ignition modules.

Built around a magnetic pick-up trigger and a male terminal connector, this distributor integrates directly with the factory EFI wiring harness and ECM on compatible non-Vortec applications. Computer-controlled advance means the ECM manages ignition timing — no mechanical or vacuum advance tuning is required. The machined aluminum housing and steel gear are built for long-term durability in daily-driven trucks and working vehicles.

No ignition box is required. An external coil is needed and is not included. Verify distributor gear material compatibility with your camshaft before installation — the steel gear is most compatible with cast iron hydraulic and solid flat-tappet camshafts.

Applications
Compatible with Chevrolet Small Block V8 Gen. I (5.0L / 305 CID and 5.7L / 350 CID) and Chevrolet Big Block V8 Gen. II Mark IV and Gen. V (7.4L / 454 CID) in non-Vortec EFI applications. Primary year range: 1987–1995. For 1996–1997, application is limited to one-ton G and P series vans only — not compatible with 1996–1997 Vortec-equipped trucks or SUVs. Confirmed common vehicle applications include Chevrolet C/K 1500, C/K 2500, C/K 3500, and Suburban; GMC Sierra and Suburban.

What engines and year range is this distributor designed for?
This distributor is designed for Chevrolet Gen. I Small Block V8 engines—5.0L (305 CID) and 5.7L (350 CID)—and Chevrolet Big Block 7.4L (454 CID) Mark IV and Gen. V engines used with non-Vortec EFI systems. Primary fitment covers 1987–1995 applications. For 1996–1997, this distributor fits only select one-ton G-Series and P-Series vans equipped with non-Vortec engines. It is not compatible with Vortec-equipped trucks or SUVs.

Will this distributor fit my 1996 or 1997 Chevy truck or Suburban?
No. Most 1996–1997 Chevrolet and GMC trucks, SUVs, and Suburbans switched to the Vortec ignition system, which uses a different distributor. This distributor fits only select 1996–1997 one-ton G-Series and P-Series vans equipped with non-Vortec EFI engines. Verify your engine and ignition system before ordering.

Is this distributor compatible with Vortec EFI applications?
No. This distributor is designed for GM TBI and TPI EFI systems used from 1987 through 1995. It is not compatible with Vortec EFI engines, which use a different distributor, connector, and ignition calibration.

Will this distributor work with my factory ECM?
Yes. This distributor uses a magnetic pickup trigger and computer-controlled advance designed to integrate directly with the factory ECM on compatible 1987–1995 non-Vortec EFI applications. No ECM reprogramming is required.

Does this distributor fit both small block and big block Chevrolet V8 engines?
Yes. It fits Chevrolet Gen. I Small Block 305 and 350 CID engines, along with Chevrolet 454 CID Mark IV and Gen. V Big Block engines used with non-Vortec EFI systems from 1987–1995.

What vehicles does this distributor fit?
Common applications include the Chevrolet C/K 1500, C/K 2500, C/K 3500, Suburban, G-Series vans, and P-Series step vans, as well as GMC Sierra, Suburban, Vandura, and Rally Wagon models equipped with compatible 305, 350, or 454 non-Vortec EFI engines. Always verify your engine and model year before ordering.

Do I need an ignition box with this distributor?
No. This distributor is designed to operate with the factory ECM and an external ignition coil. No separate ignition box or CDI unit is required.

What coil does this distributor require?
An external ignition coil is required and is not included. Use a coil compatible with your factory EFI ignition system and existing vehicle wiring.

Is the distributor gear compatible with my camshaft?
This distributor includes a steel distributor gear that is most compatible with cast iron hydraulic and solid flat tappet camshafts. If your engine uses a roller or specialty camshaft, consult your camshaft manufacturer for the recommended distributor gear material before installation.

What electrical system does this distributor require?
This distributor requires a 12-volt electrical system with a functioning alternator. It is not compatible with 6-volt systems, generator-equipped vehicles, or ballast resistor ignition circuits.

Do I need to set ignition timing after installation?
On factory EFI applications, the ECM controls ignition advance. After installation, verify base timing and distributor indexing according to the factory service procedure for your vehicle. Incorrect distributor positioning can cause hard starting, poor performance, or diagnostic trouble codes.