Details Universal SBC/BBC Engine Mount Polyurethane Bushings for a Comfortable Ride Weld-on Frame Standoffs, Bolt-On Engine Mounts with Hardware Sold As a Kit This mount will use the 916-34545 replacement bushing. Welding and fitting required. Specifications Sold As a Kit Color: Black Notes: 20.38″ bushing from eyelet when bolted to Chevy block (each mount is 3.31″ long to center of bushing). Three engine mount holes are 3.50″ center to center. Frame brackets are 3-7/8″ long. Hardware Included: Yes Overall Height: 4.13 Bore Diameter: 0.50 Bushing Length: 1.81 Base Length: 4.08 Base Width: 4.28 Material Thickness: 0.25 Bushing Included: Yes Engine Mount Type: Frame & Block Mounts Application Compatibility: Engine Replacement Mount Style: Weld/Bolt Mount Material: Steel Mount Finish: Painted Production Number: 91018040