HEI Distributor Upgrade for Classic Mustangs & Camaros

Points ignition is period-correct — and a common source of misfires, hard starts, and weekend tune-ups. An HEI distributor (or HEI-style electronic upgrade) is one of the highest-ROI ignition searches for classic Mustangs and first-gen Camaros.

Why enthusiasts switch

• Stronger spark at idle and higher RPM
• No points gap to file every few months
• Easier cold starts with a healthy coil setup
• Wide aftermarket support for curve kits and modules

Concours cars may keep points. Drivers and restomods almost always go electronic.

Mustang vs Camaro shopping

Camaro / SBC (327–350): “Small-block Chevy HEI” listings are everywhere. Confirm cap clearance under the hood and whether you want an internal-coil HEI or an external-coil electronic distributor.

Mustang / Windsor (289–302): Ford-specific electronic distributors and conversion kits are the correct path — don't force a Chevy HEI onto a Ford block. Match shaft, gear, and vacuum advance to your engine.

Browse electrical and engine parts on the Mustang and Camaro pages.

What to replace with the distributor

1. Plug wires (correct length and boot angles)
2. Spark plugs gapped for your tune
3. Coil (if external)
4. Often the ballast resistor wiring strategy — follow the kit instructions so you don't underfeed or cook the coil

Weak fuel delivery still feels like an ignition problem. If the car bogs with a new dizzy, revisit the carburetor and fuel tank.

After install: set timing properly

Electronic ignition doesn't excuse a wild initial advance. Use a timing light, set initial timing to a sensible street baseline, then verify total mechanical advance. Vacuum advance cans should be connected as intended for cruise economy and throttle response.

Wiring and harness notes

If under-dash or engine-bay wiring is brittle, fix that first — see our wiring harness warning signs. A new distributor on a fried harness is just a prettier misfire.

A clean ignition system makes every other performance part feel sharper. Start here if your classic still smells like burnt points.