1967-1970 Mustang Coilovers: Off-Season Build Guide

Winter is coil-over season for the classic Mustang. With your 1967-1970 fastback or coupe tucked in the garage until spring, the off-season is the perfect window to tear into that 55-year-old front end and replace the factory upper-arm-mounted coil springs and soggy shocks with a modern adjustable coil-over suspension. A 1967-1970 Mustang coil-over system swaps the stock geometry for ride-height-adjustable, valved damping that transforms how the car turns, stops, and rides — and doing the work now means you roll out for the first warm weekend already dialed in.

Why the Off-Season Is the Right Time for Mustang Coil-Overs

Winter is the ideal time to install classic Mustang coil-overs because the car is already off the road and a front-suspension rebuild takes a full weekend or more. A 1967-1970 Mustang from the factory rides on an unequal-length A-arm front suspension with the coil spring perched on top of the upper control arm, a separate strut rod, and a live rear axle on leaf springs. That layout was fine for 1967, but 55-plus years of worn bushings, sagging springs, and tired shocks leave most survivors wallowing and vague. Pulling the front end apart in a cold garage — instead of during prime cruising weather — means you lose zero driving days and roll out in spring on a chassis that finally matches the car's looks.

At NLP Performance in Tampa, FL, we see the same pattern every fall: enthusiasts up north park the muscle car, then use the cold months to knock out the big projects — suspension, brakes, and driveline — that are miserable to tackle in July heat or when you would rather be driving. A coil-over conversion is the single upgrade that most changes how a first-gen Mustang feels, so it earns the top spot on the winter list.

Best 1967-1970 Mustang Coil-Over Kits Compared

The best 1967-1970 Mustang coil-over kit for you depends on how far you want to go and what you want to spend. A complete front-and-rear system with tubular arms and a 4-link is the ultimate handling package; a front-only coil-over set is the highest-value single upgrade; and tubular StrongArms fix the factory geometry for anyone chasing alignment and caster. Here is how the kits we stock for the first-gen Mustang stack up.

Top Pick: Ridetech 67-70 Mustang HQ CoilOver System

The Ridetech 67-70 Mustang HQ CoilOver System is a complete, four-corner coil-over suspension for the 1967-1970 Ford Mustang. In one part number (12100202) you get front and rear HQ Series coil-overs, tubular front upper and lower StrongArms, a bolt-on rear 4-link that converts the leaf-spring rear to coil-overs, and a front MuscleBar sway bar. It is the closest thing to a turn-key modern chassis for a first-gen Mustang, and it is the reason this kit is our off-season top pick.

The HQ (Handling Quality) shocks are single-adjustable monotube coil-overs with 26 positions on one knob, so you can dial the ride from soft cruiser to firm canyon-carver without pulling a wheel. Each shock uses an impact-forged aluminum body, a 5/8-inch chrome shaft, and a 1.834-inch piston — a genuine performance damper, not a repurposed replacement shock. The tubular StrongArms are where the geometry magic happens: the lower arms combine the control arm and strut rod into one rigid piece with added caster and a sealed bearing in an aluminum housing in place of the factory rubber, while the uppers correct the ball-joint angles for tall spindles and add caster for high-speed stability.

Best Value: Ridetech 67-70 Front CoilOvers

If you want the biggest handling gain for the fewest dollars, start with the front coil-overs. The Ridetech 67-70 Mustang and Mercury Cougar HQ Series front pair replaces the factory upper-arm coil spring and shock with a proper adjustable coil-over, and at around $990 it is the single most cost-effective step in a first-gen Mustang's suspension. You keep the same 26-way HQ damper found in the full system, and you can add the StrongArms and rear coil-overs later as the off-season budget allows.

Budget Alternative: QA1 67-73 Mustang Pro Front Coil-Over System

The QA1 Pro front coil-over system is the value play for anyone building a first-gen Mustang on a stricter off-season budget. For around $855 (down from $947) you get a pair of billet-aluminum, single-adjustable coil-over shocks with 18 damping settings, high-travel springs, and ride-height adjustment from stock down to roughly 2 inches lower. This kit is single-adjustable in the sense that one knob tunes rebound and compression together, and it fits 1967-1973 Mustangs, so it covers our 1967-1970 target and then some. Every unit is dyno-tested, serialized, and made in the USA.

Do You Need Tubular StrongArms With Your Coil-Overs?

Tubular control arms are strongly recommended, but not strictly required, when you install front coil-overs on a first-gen Mustang. The Ridetech 67-70 Front Lower StrongArms replace the flimsy factory stamped-steel lower arm and separate strut rod with a single rigid tubular piece, and they build in extra caster plus a sealed bearing in an aluminum housing where the car used to rely on soft rubber. That combination sharpens turn-in, stabilizes the car at highway speed, and lets an alignment shop actually reach modern caster and camber numbers — something the worn factory geometry often cannot. If your off-season plan includes wider or taller-sidewall modern tires, the StrongArms are the piece that makes them work.

Going Full Coil-Over: Converting the Rear

Converting the rear of a first-gen Mustang to coil-overs is what separates a good-handling car from a genuinely modern one. From the factory the 1967-1970 Mustang runs a live rear axle on leaf springs, which limits how flat the car stays and how much power it can put down. The Ridetech 67-70 Mustang HQ Series rear coil-over pair (about $840) swaps in 26-way adjustable dampers, but it needs a 4-link to locate the axle — which is exactly why the complete HQ system bundles the bolt-on 4-link. If you are piecing a build together, budget for the 4-link when you plan the rear, or step up to the full system and get everything matched from the start.

How to Choose Your Off-Season Mustang Suspension Path

Pick your coil-over path by budget and how complete you want the car by spring. If you want the whole job done once, the Ridetech HQ complete system is the answer — front and rear coil-overs, tubular arms, 4-link, and sway bar in one part number for around $6,230. If you are spreading the build across the off-season, start with front coil-overs (Ridetech at about $990 or the QA1 kit near $855), add the StrongArms to unlock alignment, then convert the rear with the coil-over pair and a 4-link. Every one of these parts is in stock and ships from NLP Performance, and you can browse the rest of our coil-over collection and suspension parts to round out the build.