JDMSPEED HEI Distributor with Spark Plug Wires for Chevy SBC/BBC 350/454 - Red Cap, 10.5mm High-Performance Leads

JDMSPEED HEI Distributor and spark plug wire kit is a drop-in replacement designed to restore electronic ignition performance for Chevy small-block and big-block V8 engines.

This complete HEI distributor assembly with matching spark plug wires fits a wide range of General Motors V8 engines and is built as a direct replacement for GM 4-pin ignition module applications. It pairs an HEI-style distributor cap (red) with 10.5mm high-performance spark plug wires, giving you a single kit to address worn distributors, failed modules, or brittle ignition leads. The package is intended for popular Chevy engines — including 283, 305, 307, 327, 350, 400 small blocks and 396, 427, 454 big blocks — and comes ready to install on SBC and BBC platforms.

Will this HEI distributor fit my Chevy 350 small-block?

Yes — the unit is made to replace factory distributors on most Chevy 350 configurations that use a 4-pin ignition module. Confirm distributor length and gear compatibility with your block and camshaft before installing to ensure proper engagement and timing.

• Compatible engines: 283, 305, 307, 327, 350, 400 (small blocks)
• Also fits big blocks: 396, 427, 454 with appropriate driveline checks
• Designed for GM 4-pin electronic ignition module applications
• Red cap HEI housing for OEM-style appearance

What components are included, and what are the spark wire specs?

The kit includes one complete HEI distributor and one full set of plug wires. The wires are 10.5mm high-performance racing leads with straight boots to mate with spark plugs, while the distributor uses 90-degree HEI-style boots where it meets the cap for proper routing.

• One HEI distributor with red cap and 90° HEI-style tower boots
• One set of 10.5mm high-performance spark plug wires with straight boots
• Designed for durability in high-voltage ignition systems
• Pre-assembled, ready for timing and installation

How do I install and set timing with this distributor kit?

Installation follows standard HEI distributor procedures: install distributor gear and align rotor to the correct firing position, set initial base timing, and then fine-tune with a timing light while the engine runs. If you’re replacing a stock unit, transfer the reluctor/gear as needed and verify mechanical and vacuum advance operation.

• Install distributor so rotor points to the #1 cylinder mark at TDC
• Hook up wire set according to firing order and routing best practices
• Set base timing, then check and adjust with engine at operating temperature
• Inspect gear and drive for wear; use correct lubricant during installation

What should I check before buying this replacement distributor?

Measure distributor length and verify gear type for your engine and camshaft. Confirm that your vehicle uses a 4-pin ignition module and that the red-cap HEI style fits within your engine bay and spark plug wire routing needs.

• Verify your engine model and 4-pin GM ignition compatibility
• Check physical clearance for HEI cap and wire towers in tight engine compartments
• Confirm timing cover and gear match for proper mesh with cam/drive
• Ensure wire routing won’t contact exhaust or hot surfaces

Who this is for: Mechanics, hobbyists, and restorers who need a reliable, ready-to-install HEI replacement for Chevy small-block and big-block V8s will appreciate this JDMSPEED kit. It’s aimed at anyone restoring driveability or replacing failed electronic ignition components on SBC 350, BBC 454 and related GM engines who wants a single-package solution that includes both the distributor and high-performance spark plug wires.