New from Trans-Dapt – the LS swap motor mount kit for Tri-Five Chevys. These mounts are bolt-in and use either standard rubber or upgraded polyurethane to seat the popular LS V8 in the engine bay of your classic Bowtie. See more details below.

Official Release:

Trans-Dapt has developed a solution for those looking to add modern power to their 1955-57 Chevrolet 150, 210, Bel Air, and Nomad with its LS Swap Motor Mount Kit. The LS Swap Motor Mount Kit is a bolt-in design which requires no welding, allowing Tri-5 Chevys to benefit from the power and reliability of a new LS engine.

The 1955–1957 Chevrolet Bel Air, 150, 210, and Nomad are some of the most recognizable and iconic classic cars to ever wear a bowtie. Beyond their visual appeal, they were the start of a new era for Chevrolet as the first cars to receive its new 265ci small block V8. Although state of the art for the time, this first generation of Chevy’s iconic small block V8 only made 150-180 horsepower. Now with Trans Dapt’s LS Swap Motor Mount Kit, enthusiasts can easily add the power and reliability of a modern LS engine into their classic Chevy Tri-5.

Trans-Dapt’s LS Swap Motor Mount Kit includes a pair of frame mount brackets, engine adapter plates, and is available with either rubber pads (Part Number #4199) or polyurethane pads (Part Number #4200). While the rubber pad kit will provide a smoother feel, the polyurethane pads will transfer more power to the wheels and last longer, with an average life expectancy of 8-10 years. These bolt-on kits installs easily with no welding required, and are compatible with the entire range of Chevrolet’s Generation III and IV LS engines.


  • Bolt-in design (no welding required)
  • Allows Tri-Fives to benefit from power/reliability of LS engines
  • Includes a pair of frame mount brackets, engine adapter plates, and either rubber or polyurethane pads