These 1947-59 Chevy, GMC truck engine and transmission mounts are high quality items at a very moderate price. Engine mounts weld tothe frame rails allowing you to set the engine wherever you want depending on your application. Transmission crossmember mounts to bottom of frame and allows clearance for aftermarket floor mounted power brake boosters. Works great for trucks converting to an LS engine and runningMustang 2front suspension. LS conversions require the suggested adapters below.