This is the same version as our earlier mount (2142) only these are a bit taller by about 3/4-1″. This will cover all big block engines and the installation of the LS1 engines in early Chevy (66-78) trucks. It is also a safety mount, which when the rubber starts to deteriorate and crack, the motor will only move a slight amount.These quality items work great with our engine mount kits, engine crossmembers and I.F.S side mounts