The original points-style ignition on classic C10 trucks is inefficient by modern standards. Upgrading to an HEI distributor is one of the best bang-for-buck mods you can do.
What is HEI?
HEI (High Energy Ignition) is GM’s self-contained ignition system introduced in 1974. It combines the coil, module, and distributor into a single unit. No external coil, no points, no condenser — and it produces a much hotter spark than the original setup.
Benefits of HEI on a Classic SBC:
- Hotter spark = better combustion, easier starting
- No points adjustment or replacement
- Self-contained, clean installation
- Better performance at high RPM
- Compatible with modern electronic timing controls
Best Option: Voltstorm Drop-In HEI
The Voltstorm HEI Distributor for SBC/BBC V8 is a complete drop-in replacement. It fits all small and big block Chevy V8s, requires a single 12V power wire, and uses the existing distributor hole and hold-down.
The cap and rotor are standard HEI replacements, available anywhere auto parts are sold.
Installation Tips:
- Mark the #1 cylinder TDC before removing the old distributor
- Install HEI with rotor pointing at #1 firing position
- Connect the single 12V ignition wire (key-on power)
- Set initial timing to 10–14° BTDC with timing light
- Total mechanical advance should be 34–38° total
Simple 1-hour swap with significant performance gains. What’s your current ignition setup?