UMI Performance 70-74 GM F-Body LS Swap/T56 KitUMIs LS swap kit features engine mounts and a T56 crossmember used to place a new drivetrain in 1970 1974 GM F Body cars. UMIs LS engine mounts locate the LSx engine properly on the 1970 1974 crossmember. The mounts feature precision laser cut 3 16 steel and a tough powder coat finish. Engine vibration is damped using the latest greaseable polyurethane bushing technology. Slotted design permits 1 fore aft movement while crankshaft height remains in