SPC Performance 63-70 Chevrolet C10 Adjustable Upper Control Arms

SPC Performance is known for creating suspension components that let you dial in your vehicle's alignment precisely, and these adjustable upper control arms for classic GM trucks are a prime example. If you're working on a 1963-1970 Chevrolet C10, C15, Blazer, Jimmy, or a similar GM vehicle from that era, these arms are designed to give you a much more modern and adjustable suspension setup. They help you achieve better alignment angles, which is crucial for handling and tire wear, especially if you're aiming for a Pro Touring or track-ready build, or even just a more comfortable daily driver.

What sets these arms apart is their patented design, which offers the most adjustability and clearance available for these trucks. SPC includes ball studs that are 1/2" taller than stock. This small change significantly improves the camber curve as the suspension moves, leading to better tire contact with the road through the entire range of motion. You can then easily adjust both camber and caster by up to ±3.00° to fine-tune the suspension geometry. The ball joints themselves are a strong point – they're greaseable and fully rebuildable, meaning you can maintain them for long life and replace parts if needed, rather than the whole arm. SPC also offers optional OE-length and 1/4" extended studs, allowing for even more specific tuning of your suspension geometry.

These control arms are sold as a pair, and you'll need one pair per axle. While these arms are a significant upgrade on their own, consider pairing them with SPC's available lower control arms to completely transform the front suspension of your classic American muscle truck. This comprehensive approach can really change how your vehicle handles and feels on the road.