Installs a SB CHEVY V8 (Gen 1) OR 4.3L V6 into a 1976-86 JEEP CJThis motor mount kit uses polyurethane mount pads. The "tighter" Polyurethane material helps transfer more power through the drivetrain, to the wheels. Unlike all-steel motor mount set-ups, polyurethane pads won't rattle your teeth loose.