THIS IS FOR A NEW 1955-1956-1957 CHEVROLET CAR CPP BRAND TURBO 350, 400, 200R AND 700R-4 TUBULAR TRANSMISSION CROSSMEMBER, FRAME BRACKETS AND NEW A RUBBER TRANS MOUNT. THIS WILL NOT WORK ON A CONVERTIBLE. THIS IS TO HOLD UP THE BACK OF YOUR TRANSMISSION. IT WORKS WITH OUR TURBO MOUNT KIT AND ANY SIDE ENGINE MOUNT KIT THAT WE HAVE LISTED. SKU #23979