LS Conversion Specialists

LS engine swap kits for 1955 to 2003 cars and trucks

1955-1957 Chevy LS Conversion

This LS conversion is for 1955-1957 Bel Air, Biscayne, 150, 210 and Delray. The center of this conversion is our engine mounts and crossmember kit. This mount kit comes with bolt-in frame brackets specifically made for this LS conversion. Unlike most LS swap parts on the market everything here was made to work together, so you'll have clean mounting of your engine and not a mix of unrelated parts. Our engine mounts position the engine so there is no steering interference, and our crossmember maintains the proper drive-line angle. There are many options to complete this conversion including, oil pans, headers, fuel system, cooling, front accessories, and wiring. Simply scroll down through the following part groups to see all that we offer for an easy, strong, and clean installation of your LS engine.

Everything here is made specifically for your car

1955-57 Chevy

LS Series Swap

For 2014+ LT Series Click Here

No generic hope-it-fits parts here. Everything was developed on a real project car for the best possible fit.

Sold separately so you get what you need.

Available Transmissions

557-0002-56    LS and T-56 or TR-6060*

557-0002-60    LS and 4L60E to 4L70E

557-0002-80    LS and 4L80E or 4L85E

557-0002-89    LS and 6L80E to 10L90E*

557-0002-40    LS and TH400

557-0002-35    LS and PG,TH350 or 4spd

Mount and Crossmember Kit

This mount and crossmember kit will position your engine in the best position for the rest of the build. It provides clearance for the factory heater box, power brake boosters, and aftermarket suspension components. The kit includes motor mounts, frame brackets, crossmember, crossmember frame brackets, transmission mount, and hardware.  Manufactured from American made steel, laser cut, precision bent, and powder coated. Engine mounts feature polyurethane bushings with a lifetime free replacement warranty.                                 $529.00

Click here for installed photos

*Using a TR-6060 and some 8L90E/10L90E transmissions will require the use of one of the late model mount adapters listed below.

Individual Components

For those of you working on custom applications we offer our engine mounts separately.

557-1302-00      Engine mounts and frame brackets only                       $299.00


557-2200-00      Sure-fit Crossmember (except Convertible)                  $299.00

Late Model Transmission Mount Adapters

We have adapter brackets available for those of you using Camaro TR-6060 or CTS-V T-56 manual transmissions and CTS-V 6L80E or 8L90E automatics. Click here for more info.


Solid Race Bushings

Also available are solid race bushings for our engine mounts.

Oil Pan kits

We developed our MuscleRods high-clearance oil pan to offer the best combination of fit, clearance, oil control and ease of installation. Built to our specs by Moroso, the pan works with strokes up to 4.125" and retains the OEM oil filter location. The high-clearance pan kit includes the pickup tube, gasket, hardware and our exclusive pickup-tube girdle. The GM LH8 Muscle Car pan can also be used with this conversion, but please be aware the sump will extend below the front crossmember approximately 1 to 1-1/2 inches. For this reason our high-clearance pan is a must for any vehicle that has been lowered.

Click here for oil pan install article.

000-6400-00      High Clearance Oil Pan                                                  $529.00


000-6100-00      LH8 Oil Pan                                                                    $299.00


000-6102-00      LH8 Oil Pan (machined for ‘08 up VVT bypass)             $379.00

Our High Clearance oil pan will be flush or above the front crossmember.

Baffled for better oil control.

OE oil filter location.

Oil pan kits come with our exclusive pickup tube girdle.

BRP Oil Pump Pickup Tube Girdle

Original GM oil pickup tubes are fastened to the pump with a single bolt mating flange on the tube. The bolt hole on the other side is not used. Our Girdle is cnc machined aluminum and goes over the original mating flange, wraps around the tube, and fastens using both bolt holes. Use with a little Locktight and it’s cheap insurance against an engine meltdown. It comes with two longer bolts for install.

000-6000-00      Girdle with hardware                                                      $24.95



MR45606      1 ¾” ceramic coated mid-length headers                           $604.00


MR45616      1 ¾” ceramic coated long tube headers                             $789.00


MR45636      1 7/8” ceramic coated long tube headers                           $839.00


MR45656      2” ceramic coated long tube headers                                 $939.00


MR45626      1 ¾” stepped to 1 7/8” ceramic coated long tube               $989.00


MR45646      1 7/8” stepped to 2” ceramic coated long tube                   $1039.00


MuscleRods Ceramic Coated Headers

Our ceramic-coated headers offer many features that are normally only found on custom race headers. We start with 3/8" laser cut flanges with the tubes welded inside and out and then machined. The mid-length headers use a gasket-less ball and socket type collector for a leak free install. The long tubes feature a slip-fit collector that when used in conjunction with band clamps offer great ground clearance .We offer several sizes so you can match them to your horsepower level. Our stepped headers offer great high rpm performance while retaining good low and mid-range power. They all include gaskets, bolts, reducers, and O2 sensor bungs. Standard ceramic finish is polished silver, contact us for bare steel and black ceramic coated pricing.

MuscleRods Stainless Steel Headers

We have found that 1 7/8" is the best size header for most LS swaps. So, we now offer a 1 7/8" long-tube header in stainless steel specifically for this LS swap. These headers feature 3/8" flanges and very smooths bends that create a great raw stainless look. The 304 Stainless steel ensures maintenance-free longevity. The slip-fit collector when used with stainless steel band clamps offer the best ground clearance in the industry and the collector merge-spike increases power. They include gaskets, bolts, and O2 sensor bungs.


557-6795      1 7/8” Stainless Steel long-tube headers                           $1049.00

All of our stainless headers feature a collector merge-spike that creates a smooth transition from the primary tube into the collector. It reduces low pressure turbulence increasing the scavenging effect of the cylinders thus increasing flow and power output.

Smooth bends and transitions in 304 stainless steel.

All headers are designed to clear 500 and 600 series steering boxes.

Exhaust Accessories

We have Stainless Steel band clamps, header bolts and reducer cones to help you complete your exhaust system. Click here for more info.


Ultimate Headers

For those of you that really want to make a statement on the show field we offer these beautiful stainless mid-length headers from Ultimate Headers. These new-generation 1 7/8" headers have been developed to work with our engine mounts and with their investment cast flanges deliver the crowning touch to a show winning custom car build. Contact us for more info and pricing.

EFI In-Tank Pump Fuel Tanks kits

These conversion fuel tanks solve the problem of supplying your new LS engine with a steady flow of fuel. The tanks, made specifically for your car, feature a recessed area in the top for the fuel pump module and sending unit, so no floor modifications are needed for clearance. They have an innovative baffling system inside to control fuel slosh and keep the pump fed even at low fuel levels and extreme driving conditions. They are galvanized steel and powder coated silver for maximum durability. The kit includes a fuel sending unit designed to work with your factory style fuel gauge. The included fuel pump module features an in-tank wiring harness and three ports - one for the feed line, one for the return line, and one for the vent. The kit has two available Walbro fuel pump options. The standard 255 LPH pump or the 400 LPH pump for supercharged or 550+hp applications. The kit also includes vent filter, gaskets, and hardware. They look like original equipment from under the car and are absolutely the best way to go when converting to EFI.

557-6680-04       55-56 Chevy EFI Fuel Tank kit - 255 LPH pump             $549.00


557-6680-06       55-56 Chevy  EFI Fuel Tank kit - 400 LPH pump            $629.00


557-6681-04       57 Chevy EFI Fuel Tank kit - 255 LPH pump                  $549.00


557-6681-06       57 Chevy EFI Fuel Tank kit - 400 LPH pump                  $629.00

Fuel Line and Regulator Kit

Our quick and easy complete fuel line systems includes everything needed to go from the fuel tank to the LS fuel rail. Includes P.T.F.E. braided and covered fuel line, an OE style fuel filter/regulator combo, line clamps, and all fittings and connectors needed. Standard kit is for 255 LPH pumps with a 400 LPH version also available. Click for more info.

6 6ylinder configuration in black epoxy coating.

LS Conversion Radiators

We now offer conversion radiators specifically designed for your car with an LS engine. They feature all aluminum construction, but unlike others on the market, they have beautifully stamped tanks with strengthening indentations just like your original. The all important steam port bung is welded into the upper part of the tank which lets your new LS engine vent properly. They also include a coolant temp fan switch in the tank. Excellent restoration type quality made in the USA. Available in bare aluminum or black and with or without a 16" high performance electric fan installed. The radiators below are in the 6 cylinder configuration that mounts to the front of the core support to allow for extra front accessory and fan clearance. Contact us for V8 configuration.


313-9013-0M        55-57 Chevy LS Radiator (Manual Trans)                    $679.00


313-9013-0A         55-57 Chevy LS Radiator (Auto Trans)                        $755.00


313-9013-MF        55-57 Chevy LS Radiator (Manual Trans) with Fan     $1078.00


313-9013-AF         55-57 Chevy LS Radiator (Auto Trans) with Fan         $1154.00

LS Swap Hoses and Line Kits

Check here for radiator hoses, transmission line and power steering kits to complete your swap.

Wiring Harnesses and Computer

We offer many stand-alone harnesses as well as harness and re-flashed computer packages.

Gauge Components and Sensors

We offer a group of gauge adapters and sensors to get your original gauges working with your late model engine and transmission  For more info click here.

Hydraulic Clutch Conversion Kits

This hydraulic clutch conversion kit is a must when installing a T56 (or TR6060) in your earlier vehicle. These easy bolt-in kits get you the great pedal feel of a hydraulic system and years of dependable, maintenance-free use.

LS Front Accessory Drives

Whether you are looking for original equipment style, or full billet custom, we have you covered. We have partial and complete kits in several finishes, that have been tested to work with our other components and your car. Hit the link for more info.

LS Engine and MuscleRods T-Shirts

Check out our Apparel Section for the latest in LS Engine and MuscleRods gear.


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