ime to perform the electric headlight door conversion. We are moving from vacuum headlight doors to electric on our C3 Project 1971 Corvette. We’ve addressed the suspension, brakes, and powertrain, and even restored the exterior color from its as-found yellow to the original classic white.

With the help of Phoenix-based Hot Rods by Dean, we’ve completely torn down the car and rebuilt it from the ground up. Every nut, bolt, wire, and hose has been replaced, restored, or upgraded. It’s all been more complicated than it sounds because just about everything on a vintage Corvette is more complicated than it sounds.

It may be a Chevy at its core, but a Corvette is different in almost every respect—including the headlights. The C2-C5 generations had pop-up headlight systems, and while the C2 models used straightforward, largely reliable, electrically operated doors, the C3 generation, including our 1971, inexplicably switched to vacuum-actuated doors. We’ve never heard a good reason for the change. Perhaps a few hoses and a pair of vacuum actuators were cheaper than electrical motors and the related wiring, but the results of the changeover could most generously be called “mixed.”

Most C3s have experienced issues with the doors’ operation, but even with a correctly operating vacuum system, high-performance engine upgrades can affect their performance. Specifically, a lumpy, lopey camshaft profile with more overlap will reduce vacuum production and make it harder to open or close the headlight doors.

In short, they’ve been a pain pretty much from the start, and an electric headlight door conversion is absolutely the way to go for restomod cars like our project, which will be powered by a 383 stroker small-block that likely wouldn’t generate much usable vacuum for the stock headlights. We went with Detroit Speed’s conversion kit (PN 122009) as part of a comprehensive headlight overhaul that also included a rebuild of the headlight buckets and another upgrade to Holley’s RetroBright lamps (PNs LFRB146, high beam; LFRB145, low beam). Remember, we are working with 55-plus-year-old headlight doors, so you know they will need refurbishing. We looked to Summit Racing Equipment for their headlight door rebuild kit, which contains all the necessary springs, bushings, clips, and hardware.

Fortunately, this illuminating upgrade project proved largely straightforward, with the Detroit Speed conversion kit essentially replacing the stock vacuum actuators and all the vacuum hoses with a simple pair of electric actuators and a control module. They even operate the stock pivots on the headlight doors.

As for the RetroBright headlights, they use replaceable LED cartridges rather than conventional sealed-beam halogen bulbs. For most vintage vehicles, they plug right into the stock harnesses and offer more than twice the lighting output of the original lights. There’s also the advantage of a lower electrical draw, and Holley says they last up to six times longer than conventional bulbs.

We’ve got plenty more projects to complete on our Corvette, including another vacuum-to-electric conversion for the wiper concealment door, but that will be the subject of another story. For this one, we’re shining the spotlight on the C3’s headlamps.

or more than 40 years, hidden headlamps were a signature cue of the Corvette’s design. Starting with the ground-breaking design of the C2 “Sting Ray” generation in 1963, and running all the way to the end of the C5 generation, in 2004, they contributed to the sleek, aerodynamic pro  le of four eras of the car. Each system operated di  erently. Here’s a quick look at what made each unique.