1973-1977 A-Body LS Swap Kit and Parts

Everything listed for an LS V8 swap in a 1973-1977 A-Body, from a Chevelle or El Camino to a 1977 Oldsmobile Cutlass: the Muscle Rods conversion kit, engine mounts, the Sure-Fit crossmember, mid-length and long tube headers, DIY in-tank fuel pump kits for your existing tank, and aluminum radiators.

Made in the USA kit
Frame mounts use factory holes
No tunnel cutting with a 4L60E to 4L80E

The 1973-1977 A-Body LS install guide shows which frame holes to use. When ready, start your kit.

$539.00 1973-1977 A-Body LS Conversion Kit

$299.00 1973-1977 A-Body LS Engine Mounts and Frame Bracket Kit

$309.00 1973-1977 A-body Sure-Fit Crossmember

$299.00 Cast Aluminum Retro LS Oil Pan Kit

$742.30 1973-1977 A-Body LS 1-7/8 Ceramic Coated Mid-Length Headers

$939.00 1973-1977 A-body LS 1-7/8 Ceramic Coated Long Tube Headers

$670.37 DIY in-Tank Fuel Pump Kit-200 LPH

$739.56 DIY in-Tank Fuel Pump Kit-340 LPH

$885.99 1973-1977 A-Body LS Radiator (Manual Trans)

$991.99 1973-1977 A-Body LS Radiator (Automatic Trans)

$1,362.99 1973-1977 A-Body LS Radiator (Manual Trans) with Fans

$1,468.99 1973-1977 A-Body LS Radiator (Automatic Trans) with Fans

$299.00 Cast Iron Exhaust Manifolds for LS Engines

1973-1977 A-Body LS swap parts

Conversion kit, mounts and crossmember

Headers and manifolds

In-tank fuel pump kits

Aeromotive Phantom kits that put a pump and baffle into your existing or original-style tank.

Radiators

Oil pan

Cast Aluminum Retro LS Oil Pan Kit

What comes in the 1973-1977 A-Body LS conversion kit

2 frame brackets
2 motor mounts
Transmission crossmember
2 crossmember outer brackets
Polyurethane transmission mount and spacers
Hardware pack

1973-1977 A-Body LS swap fitment notes

Once the engine is lowered in, the frame mounts line up with factory holes in the chassis. The guide marks the driver and passenger side holes in photos.
The crossmember brackets go into the original factory bolt holes too.
BRP designed this kit around its high clearance oil pan, which sits flush with the front crossmember. The older LH8 pan reaches about 1.5 inches lower.
Four-speed automatics (4L60E, 4L65E, 4L70E, 4L75E, 4L80E) need no tunnel changes.
A T-56, TR6060, 6L80E, 6L90E or 8L90E means opening and widening the tunnel and welding or riveting in a filler panel.
The accessory drive must use high-mount A/C and alternator brackets to clear the frame.
The headers are laid out for a floor shift. Column shift cars need linkage changes or a cable linkage.
Header installs can mean removing the starter, valve covers or spark plugs.
Expect a driveshaft length change, and note the factory clutch Z-bar cannot be reused.

Notes from the 1973-1977 A-Body LS install guide.

1973-1977 A-Body LS swap FAQ

Which 1973-1977 cars does the kit fit?

The LSX20 kit lists the 1973-1977 Chevelle, Monte Carlo, El Camino, GMC Sprint, Buick Regal, Oldsmobile Cutlass, Pontiac Grand Am and Grand Prix, and the 1973-1976 Laguna.

Do the long tube headers fit every one of those models?

Check the header listing. The long tube headers name the 1973-1977 Chevelle, Monte Carlo, LeMans, Cutlass and Regal.

Is there a fuel tank for the 1973-1977 A-Body?

This page has Aeromotive Phantom DIY kits instead. Each adds a 200 or 340 LPH pump, hanger, lock ring, baffle with fuel bladder and a drill guide to your existing or original-style tank.

What does the Multi-Fit engine mount kit work with?

It is for cars that use the OEM Chevrolet clamshell frame mount, and its applications include the 1973-1977 A-Body Monte Carlo, Chevelle and Malibu. It is made to work with the Sure-Fit crossmember and mid-length headers.