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1964½–70 Mustang chassis

14 aftermarket chassis and subframes from 6 builders, compared with keeping and upgrading the original frame.

Chris Alston's Chassisworks, Detroit Speed, Roadster Shop, Schwartz Performance, Scott's Hotrods 'N Customs, Speedtech Performance

Aftermarket chassis

Prices checked Oct 2, 2026

Compare Builder & product Type Front Rear Price
Original chassis Keep it and upgrade itUnibody with welded-in front frame rails (front subframe) and short rear frame rails Factory SLA double A-arm, coil spring on upper arm inside shock tower, strut rods; recirculating-ball box with center/drag link (power cars use linkage-assist ram) Solid axle (8in/9in) on semi-elliptic leaf springs Kits from $7,534Cheapest kit in each area
Chris Alston's Chassisworks Total Control Products Weld-On Firewall-Forward Frame Clip (TCP KCFA1 / KCFT1) Fits 1964-66 Ford Mustang Front subframe A-arm; TCP packages sold separately n/a $1,691–$1,740 Clip only ($1,740 splined; $1,691 tubular). Susp: Restomod KS2 $3,850; G-Machine KS3 $4,4… Source
Chris Alston's Chassisworks Total Control Products Weld-On Firewall-Forward Frame Clip (TCP KCFA2 / KCFT2) Fits 1967-70 Ford Mustang / Mercury Cougar Front subframe A-arm; TCP packages sold separately n/a $1,714–$1,763 Clip only ($1,763 splined; $1,714 tubular). Susp: KS2 $3,850; KS3 $4,469; KS4 $8,001; KS5… Source
Chris Alston's Chassisworks Total Control Products Weld-On Full-Subframe Clip (TCP KCSA1 / KCST1) Fits 1964-66 Ford Mustang Front subframe A-arm; TCP packages sold separately n/a $2,133–$2,291 Clip only ($2,291 splined; $2,133 tubular). Susp: KS2 $3,850; KS3 $4,469; KS4 $8,001; KS5… Source
Chris Alston's Chassisworks Total Control Products Weld-On Full-Subframe Clip (TCP KCSA2 / KCST2) Fits 1967-70 Ford Mustang / Mercury Cougar Front subframe A-arm; TCP packages sold separately n/a $2,156–$2,315 Clip only ($2,315 splined; $2,156 tubular). Susp: KS2 $3,850; KS3 $4,469; KS4 $8,001; KS5… Source
Detroit Speed QuadraLink Rear Suspension Kit (041731 / 041733) Fits 1964-70 Ford Mustang Rear suspension n/a 4-link coilover with panhard $4,033.95–$6,211.95 No brackets base (041733DS) to with brackets DA (041731-DDS) Source
Chris Alston's Chassisworks Mustang 64-70 - gStreet Rear Frame Clips (7720-M10 / 7721-M10 / 7723-M10) Fits 1964-70 Ford Mustang Rear suspension n/a Canted 4-link, torque arm, or rocker-arm IRS (susp separate) $7,105–$12,115 4-link $7,105; torque arm $7,275; IRS $12,115 Source
Detroit Speed Aluma-Frame Front Suspension System (032050 Ford 5x4.5 / 032051 GM 5x4.75) Fits 1964.5-70 Ford Mustang Suspension kit Cast-aluminum cradle, tubular arms, coilovers, rack & pinion, Speed-LIGN caster/camber adjusters Not included $9,499.95–$11,299.95 Base shocks 032050DS to DA remote-reservoir (-RDS) Source
Scott's Hotrods 'N Customs 1965-1970 Mustang Chassis Fits 1965-70 Ford Mustang Full frame Scott's IFS, tubular A-arms, rack (power +$330) Parallel 4-bar with Panhard, Moser 9in $14,750–$15,650 Coilover $14,750; SuperSlam $15,650 Source
Chris Alston's Chassisworks Mustang 64-70 - gStreet 4-Link/Torque Arm Chassis (7740-M10) Fits 1964-70 Ford Mustang Full frame A-arm (sold separately) Canted 4-link or torque arm (sold separately); 35" rear rails $15,495 Chassis only. Front 7780 $4,698 / 7781 $7,398; rear 7790 $2,898 / 7791 $3,998; side mount… Source
Roadster Shop 1964-70 Mustang SPEC Fits 1964-70 Ford Mustang Full frame SLA double-wishbone IFS, 59in track, eliminates shock towers (optional) Parallel 4-link with panhard bar, no floor mods $16,495 Base price (starting configuration, before options) Source
Chris Alston's Chassisworks Mustang 64-70 - gStreet Rocker-Arm IRS Chassis (7743-M10) Fits 1964-70 Ford Mustang Full frame A-arm (sold separately) Rocker-arm coilover IRS (sold separately) $18,989 Chassis only. Front 7780 $4,698 / 7781 $7,398; IRS 7793 $16,998 Source
Roadster Shop 1964-70 Mustang FAST TRACK Fits 1965-70 Ford Mustang Full frame RS Fast Track IFS, 58.75in track, C7-based forged knuckles, sealed hubs, RS SV by Fox coilovers, 1.25in splined sway bar Large-dia parallel 4-bar, Strange Ford 9in, S/S 31-spline axles; Fast Track IRS optional $22,495 From $22,495 (base) Source
Speedtech Performance 1965-1970 Ford Mustang Extreme IRS Chassis Fits 1965-70 Ford Mustang Full frame Forged spindles, Sweet dual-power rack, QA1/JRi coilovers IRS $36,918.96 Listed price Source
Schwartz Performance 1964-1973 Mustang G-Machine Chassis Fits 1964-73 Ford Mustang Full frame Double A-arm coilover, power rack, HD splined sway bar Moser full-floating 9" (56" hub-to-hub); IRS optional Quote only Source
Tick up to 4 to compare side by side.

Reading these prices

Starting prices aren't always comparable. Some include suspension, steering and brakes; some are a bare frame or front clip and the rest is extra. Check the Front and Rear columns and each product's notes before comparing totals. "Price on request" means the builder quotes each build. Confirm with the builder before you order, and send corrections through our contact page.

Upgrade the original chassis

How it's built
Unibody with welded-in front frame rails (front subframe) and short rear frame rails
Front suspension
SLA double A-arm, coil spring on upper arm inside shock tower, strut rods; recirculating-ball box with center/drag link (power cars use linkage-assist ram)
Rear suspension
Solid axle (8in/9in) on semi-elliptic leaf springs
Weak spots
Front and rear rails are not tied together, so the floor and rockers flex and the shock towers crack. High roll-center geometry, spring loads in the towers, and vague linkage-assist steering limit grip and feel.

Stiffening the body or frame? We list 8 kits for this car, such as frame rails, subframe connectors and braces, on its Chassis stiffening page.

Suspension and steering kits for the original chassis

AreaKitWhat it doesPrice
Front suspension Total Control Products Front Coil-Over Conversion System FCOC-FD Bolt-in coilover SLA using factory points; fits 64-73 Mustang, 60-70 Falcon, 66-71 Fairlane $3,218 Base price; shock/spring options extra Source
Front suspension Ridetech StreetGRIP Suspension System, 1964-66 Mustang Dual-rate springs, sway bar, adjustable monotubes, composite rear leafs, Shelby-drop templates $3,185 Range $3,185-$3,990 by options; 64-66 only Source
Rear suspension TCI Engineering (Total Cost Involved) 1964.5-1970 Mustang Torque Arm Rear Suspension Replaces leaf springs with a torque arm and sliding front mount; axle brackets need welding $3,195 Sale price (reg $3,550); 9in housing only Source
Steering Borgeson Power Steering Conversion Kit 999020 (65-66 289/302/351W, manual) 14:1 integral power box that replaces manual or leaky linkage-assist steering; no modifications $1,154 Borgeson list Source