LS Engine Mount and Transmission Crossmember Kit, Fits 1955-57 Chevy

Description: Vehicle-Specific Design: Specially crafted LS engine mount and transmission crossmember kit tailored for the iconic 1955-57 Chevy "Tri-5.", Easy Installation: Comprehensive bolt-in solution with no welding required, utilizing factory frame rivet holes to ensure accurate alignment., Robust Construction: Motor mount supports made from heavy 7-gauge steel and LS block adapters laser cut from thick 3/8-inch steel, combined with resilient polyurethane mounts for minimized engine movement., Versatile Transmission Compatibility: Tubular steel transmission crossmember tailored for both automatic and manual LS swap transmission options, crafted from sturdy 1-3/4-inch round tubing with precise CNC bending., Comprehensive Kit: Includes LS engine mounts, transmission crossmember, and necessary hardwar 1955-57 Chevy LS Engine Mount and Transmission Crossmember Kit Sku # 91604055 Mfr. Part # 91604055 Condition New Brand Speedway Motors Sold Kit Details Info Bolt-in LS motor mount and trans mount solution for tri five Chevy with no welding required Complete kit with LS engine mounts, transmission crossmember, and hardware Included mount brackets are made from 7 gauge steel and bolt to inside of frame LS block adapters are laser cut from 3/8-inch thick steel Polyurethane motor mounts reduce engine movement and are stronger than rubber mounts Compatible with stock LS truck (Vortec) truck accessory drive LS engine location provides sufficient hood clearance to use stock Vortec truck intake Crossmember fits most modern automatic and manual transmission used in LS swaps Crossmember made from 1-3/4-inch round steel tubing with .108-inch wall thickness 1/4-inch thick welded end plates and 3/16-inch thick transmission mounting pad Fits TH350, TH400, 700R4, 4L60E, and 4L80E automatic transmissions Fits Saginaw 3/4-speed, Muncie 4-speed, and aftermarket Tremec manual transmissions LS Swap Your Tri-5 Chevy Using Our Bolt-In Motor and Trans Mount Conversion Kit Chevrolet’s iconic 1955, 1956, and 1957 models, affectionately referred to by enthusiasts as a “Tri-5 Chevy” or “tri five Chevy,” are one of the most recognizable classic cars on the planet. From usage in dozens of movies and TV shows over the decades to magazine project cars like the famed Project X (which itself was also a movie car at one time), their body lines and classic styling work well for everything from straight axle gassers to pro touring builds and everything in between. We offer thousands of parts to keep your tri five Chevy running and on the road. Now you can repower your tri five Chevy with another iconic part of GM history, the LS engine. No doubt one of the most swapped engine platforms around the globe, powering all manner of hot rods, classics, muscle cars, trucks, and more, the LS swap is a terrific way to keep classic vehicles on the road with performance that will allow modern road speeds and the safety of keeping with today’s traffic flow. Speedway Motors’ tri five LS swap motor mount and transmission crossmember kit is the key to building your tri five LS swap with an ingenious bolt-in solution for your LS engine and transmission. Thick Steel Motor Mount Supports and Adapters Create a Strong Mounting Solution Knowing that the LS engine can make some significant power we put some serious thought into how to harness all that power to your tri five’s frame and minimize engine torque movement, so all your LS engine’s power makes it to the rear tires. To facilitate proper engine location for a tri five Chevy LS swap, custom frame brackets are made from heavy 7 gauge steel (that’s roughly 3/16-inch thick) that are located using factory rivet holes in your tri five Chevy’s standard seamed frame (not compatible with seamless frames). These frame mounts are paired with LS engine block adapters made from laser cut 3/8-inch thick steel that bolt to factory mount holes on your LS block. The frame mounts and LS block adapters are shipped as bare steel, so we suggest paint or powder coating for long lasting protection and appearance. The final piece of the puzzle are our polyurethane small block chevy engine mounts. These are standard small block chevy engine mounts with interlocking safety tongue encased in tough black polyurethane insulator material. Much stronger than stock rubber small block chevy engine mounts yet dampens engine harmonics that a solid steel mount will allow to pass through to the frame and ultimately to you. Tubular Steel Transmission Crossmember Supports Auto and Manual Transmissions The original engine and transmission fitted to the tri five Chevy had what some would refer to as “reverse motor mounts” with two mounts straddling the side of the transmission bellhousing area and one mount at the front of the engine. When performing an LS swap to your tri 5 Chevy you not only have to convert to standard side engine mounts, but you need to add a traditional transmission crossmember to your ’55-’57 Chevy’s frame. Our ’55-’57 Chevy transmission crossmember in this kit is specifically designed to support all the popular LS swap automatic and manual transmission options capable of being bolted up to an LS engine. Crafted from 1-3/4-inch round tubing with .108-inch wall thickness and CNC bent for precise transmission location, heavy duty 1/4-inch thick end plates are welded on along with a 3/16-inch thick transmission mount pad. 3/16-inch frame shims are included to accommodate frame variances and mounting hardware for the crossmember, and your transmission mount, (available separately) is included as well. All You Need Are Basic Hand Tools to Add Modern LS Power To Your Tri-5 Chevy We designed our tri five LS motor mounts and transmission crossmember for the ’55-’57 Chevy LS swap to be easy to install. The frame mount installs on the side of the frame after you grind/drill out a pair of frame rivets on each side and then use the mount as a template to drill a pair of additional holes. Once this small modification is complete everything else in our tri five LS motor mounts kit bolts together with the included hardware. There is no need to mock up engine placement, as we’ve done all the challenging work for you. Once the frame mounts are installed to the frame and the adapters and SBC motor mounts to your LS block your LS engine can be lowered into place. Depending upon the LS engine being used you may need to update your LS with a to provide enough crossmember clearance. Then you’re ready to move on with your LS swap using our bolt in transmission crossmember from the kit. Our tri five transmission crossmember for LS swaps sits atop your ’55-’57 Chevy’s frame and bolts to your LS swap transmission mount of choice. We offer both a standard , as well as a option. Fall in love with your tri five Chevy all over again with a modern LS swap engine and transmission. Specs Material Type Steel Sold in Quantity Kit Finish Natural Tube O.D. 1.75 Transmission Mount Included No MFG. Part # 91604055 Notes Engine frame mounts not compatible with seamless style frame Reviews I would by this product again Rated by Mike on June 30, 2021 Summary: The Tri Five LS conversion mount kit takes the guess work out of this element of my project. Yes, I recommend this product. Good product Rated by ducky55 on May 06, 2021 Summary: Used these on my 55 chevy. Couldnt use 2 of the bolts because of lack of access. Will weld it to the frame also. Yes, I recommend this product. Related Items / Suggested Parts TH350 Transmission Cushion Mount-Polyurethane Hedman Hedders 45610 Long Tube Swap Headers, Uncoated Chevrolet Performance 19212593 LS Swap Muscle Car Oil Pan,LS1/LS3 Tech Support We're here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through eBay Messaging and a knowledgeable Speedway Motors team member will be happy to help. About Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 73 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.

Price: 311.99 USD

Location: Lincoln, Nebraska

End Time: 2025-01-27T12:07:32.000Z

Shipping Cost: 0 USD