1973–91 Squarebody Suburban chassis

3 aftermarket chassis and subframes from 1 builder, compared with keeping and upgrading the original frame.

Art Morrison Enterprises

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Aftermarket chassis

Prices checked Oct 14, 2026

Builder & product	Type	Front	Rear	Price
Original chassis Keep it and upgrade itBody-on-frame ladder chassis on a long wheelbase shared with the squarebody pickups; four-door body from 1973. Became R/V-series in 1987.	Factory	2WD: coil-spring independent front with A-arms and recirculating-ball steering. 4x4: solid front axle on leaf springs.	Solid axle on leaf springs (GM moved the rear to leaf springs for 1973).	See kits
Art Morrison Enterprises 1973-91 Chevrolet Suburban GT Sport chassis (Touring package)	Full frame	Tubular IFS with rack-and-pinion (per Art Morrison GT Sport description)	Triangulated 4-bar with coilovers (per GT Sport description)	$21,300 $21,300.00 package price on Art Morrison's chassis builder Source
Art Morrison Enterprises 1973-91 GMC Suburban GT Sport chassis (Touring package)	Full frame	Tubular IFS with rack-and-pinion (per Art Morrison GT Sport description)	Triangulated 4-bar with coilovers (per GT Sport description)	$21,300 $21,300.00 package price on Art Morrison's chassis builder Source
Art Morrison Enterprises 1973-91 Chevrolet Suburban 4x4 chassis (Foundation 4x4 / Ultimate 4x4)	Full frame	Solid axle, coilover 3-link with Panhard bar	Solid axle, triangulated 4-bar with coilovers	$60,360 Foundation 4x4 $60,360.00; Ultimate 4x4 $64,875.00 on the builder page 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: Body-on-frame ladder chassis on a long wheelbase shared with the squarebody pickups; four-door body from 1973. Became R/V-series in 1987.
Front suspension: 2WD: coil-spring independent front with A-arms and recirculating-ball steering. 4x4: solid front axle on leaf springs.
Rear suspension: Solid axle on leaf springs (GM moved the rear to leaf springs for 1973).
Weak spots: Rust in rockers, cab corners, floors and rear wheel openings; very heavy, so brakes and stock springs work hard; steering-box mount area can crack the frame.

Suspension and steering kits for the original chassis

Area	Kit	What it does	Price
Complete kit	Rough Country 4 in. Suspension Lift System with 52 in. Rear Springs (245.20)	Front and rear lift leaf springs, steering arm and hardware for 4x4s. Fitment table includes K10/V10/V1500 Suburbans in parts of 1977-91; check your exact year.	$899.95 $899.95 at Complete Web Solutions (reseller) Source
Front suspension	Belltech 3 Inch Drop Spindle Set (3200)	Pair of 3 in. drop spindles; Belltech lists 1973-1991 GM Suburban 2WD. Needs light-duty brakes with 1 in. rotors (the 3100 version is for 1.25 in. heavy-duty rotors).	$410 $410.00 on belltech.com Source
Rear suspension	Belltech 747SP Lowering Kit with Street Performance Shocks	Rear lowering kit; reseller lists 1973-86 Chevrolet C10 Suburban (7 in. rear drop, 3 in. axle housings only).	See source Reseller page shows 'Request Price' only Source
Rear suspension	QA1 1-1/4 in. Rear Sway Bar Kit (52899)	Listed for 1973-1986 Chevrolet Suburban RWD.	$530.95 $530.95 at SpringRates (reseller) Source