1971-1976 Impala and Caprice LS Swap Kit

LS swap parts for the 1971-1976 Chevy Impala and Caprice: the B-Body conversion kit, engine mounts and frame brackets, Multi-Fit mounts, the Sure-Fit crossmember, ceramic coated mid-length and long tube headers, and Aeromotive in-tank fuel pump kits.

4L60E and 4L80E fit the stock tunnel
Column shift linkage clears the headers
Crossmember brackets use original holes

The 1971-1976 B-Body LS install guide covers bracket clearance and pan choices. When you are ready, configure your B-Body kit.

$539.00 1971-1976 B-Body LS Conversion Kit

$299.00 1971-1976 Impala/Caprice LS Engine Mounts and Frame Bracket Kit

$309.00 1971-1976 B-Body Sure-Fit Crossmember

$299.00 Cast Aluminum Retro LS Oil Pan Kit

$742.30 1971-1976 B-Body LS 1-7/8 Ceramic Coated Mid-Length Headers

$939.00 1971-1976 B-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

$299.00 Cast Iron Exhaust Manifolds for LS Engines

1971-1976 Impala and Caprice LS swap parts

Conversion kit, mounts and crossmember

Headers and manifolds

In-tank fuel pump kits

Aeromotive Phantom systems for adding EFI fuel delivery to an existing or original style tank. Each comes with the pump, hanger and lock ring assemblies, a baffle with fuel bladder, a drill guide and instructions, in 200 or 340 LPH.

Oil pan and oil system

What comes in the 1971-1976 B-Body LS conversion kit

2 frame brackets
2 motor mounts
Transmission crossmember
2 crossmember brackets
1 extra frame bracket
Polyurethane transmission mount
Bolts, washers and nylon lock nuts for every joint
8 Allen head 10mm engine mount to block bolts

1971-1976 B-Body LS swap fitment notes

A 4L60E or 4L80E fits with no tunnel work. A 6L80E or 6L90E needs tunnel changes near the tail housing, and a T-56 needs them around the shifter.
The crossmember brackets bolt through the original crossmember holes. Their position depends on which frame your car has, since the factory frames varied with the transmission.
The install used an LH8 pan. BRP recommends the Moroso pan for lowered cars, and Mast Motorsports and Holley pans fit as well.
A 1998-2002 F-Body alternator clears the frame easily. The F-Body A/C compressor does not, so a Muscle Rods high mount A/C bracket is required.
Per the guide, every Muscle Rods A/C bracket and alternator or power steering bracket has room in short, medium or long spacing.
For long tubes, take out the front crossmember frame brace. The mid-length set goes in with that brace left alone.
The stock column shift linkage clears both header styles and lines up with the 4L60E shift shaft.
With the coils left in their stock location, there is room at both the factory A/C box and the power brake booster.
The kit keeps the factory suspension and steering parts.

Notes from the 1971-1976 B-Body LS install guide.

1971-1976 Impala and Caprice LS swap FAQ

Can I keep the column shifter in my 71-76 Impala?

Yes. The guide says the stock column shift linkage clears the mid-length and long tube headers and lines up with the 4L60E shift shaft.

Do I have to remove the frame brace?

Only for long tube headers. The front crossmember frame brace has to come out for them, while the mid-length headers fit around it.

What do I need to run A/C?

A high mount A/C bracket. The guide found the 1998-2002 F-Body compressor hits the frame, while the F-Body alternator clears.

Which oil pans fit a 1971-1976 B-Body LS swap?

BRP installed it with an LH8 pan and recommends the Moroso pan for lowered cars. Mast Motorsports and Holley pans fit too.

1971-1976 B-Body LS Swap Kit Parts