1967–76 Mopar A-body (Dart, Duster, Barracuda, Valiant) chassis

1 aftermarket chassis or subframe from 1 builder, compared with keeping and upgrading the original frame.

Schwartz Performance

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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 and a bolt-in K-member	Factory	SLA with longitudinal torsion bars, strut rods; Chrysler recirculating-ball box mounted on the K-member	Solid axle (7.25/8.25/8.75) on asymmetric leaf springs	Kits from $6,744.99Cheapest kit in each area
	Schwartz Performance 1967-1976 A-Body, Barracuda, Duster, Valiant G-Machine Chassis	Full frame	Double A-arm, low-friction ball joints, power rack	Ford 9"; Schwartz IRS optional	Quote only Source

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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 and a bolt-in K-member
Front suspension: SLA with longitudinal torsion bars, strut rods; Chrysler recirculating-ball box mounted on the K-member
Rear suspension: Solid axle (7.25/8.25/8.75) on asymmetric leaf springs
Weak spots: Front and rear rails are not connected, so the body twists, and the K-member can crack around the steering box. The stock box has a slow, numb ratio and the leafs allow axle wrap.

Stiffening the body or frame? We list 7 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

Area	Kit	What it does	Price
Front suspension	Reilly Motorsports (AlterKtion) AlterKtion Coil-Over System, Street/Handling, 67-76 A-body RMS301	Replaces the torsion-bar K-member with coilovers, power rack and 1.25in bar	$5,495 Reilly list; brakes extra Source
Front suspension	QA1 Front Coilover System 52343-S400 (0-2in drop, single adj)	Tubular K-member, arms, power rack and coilovers; bolt-in	$5,524.95 QA1 list Source
Rear suspension	Hotchkis Geometry Corrected Sport Leaf Springs 24385	Lowered leafs that correct roll steer and pinion geometry	$699.99 Hotchkis list Source
Steering	Firm Feel A-body Power Steering Box Rebuild (Stage I-III)	Fast-ratio rebuild with roller sector bearings and firmer reaction springs	$550 $550-$595 by stage plus $250 core Source