UMIs P/N 2406 allows the installation of LS power into your 1978-1988 GM G-Body, 1982-1992 3rd generation Camaro/Firebird and the 1974-1981 2nd generation Camaro/Firebird. UMIs LSX adapter plates bolt directly to the frame and allow the installation of any LSX engine. P/N 2406 fits factory LS engine mounts and also works with UMI P/N 2323 solid aluminum motor mounts. UMIs LS mounts place the LS engine in the factory location with the ability to move the engine rear-ward up to 1. LS mounts are CNC laser cut from 3/16 thick steel with MIG welded ¼ thick stand offs, high grade mounting hardware included.