use of conventional impact hammers used in the trade by extending the end members 14 of the frame until the inner jaws 28 of the clamping means are wedged between the pinch welds on opposite sides of the vehicle the frame is temporarily positioned in place with the frame 10 in place the workman then individually tightens each clamping device 16 by torquing down both bolts 30 until inner and outer jaw members 28 and 26 tightly grip the pinch weld this method of attachment can be performed by a single workman without the necessity of holding the frame in place while the individual clamping devices 16 are tightened onto the pinch weld this method also prevents the possibility of bending the opposing pinch welds inwardly towards each other and deforming portions of the car body once the frame 10 is rigidly attached at each clamping device 16 any of the various force transmitting tools of the trade can be attached to one or more of the attachment openings 24 located in the corners of the frame due to the four point mounting of the frame the load is equally spread over the body and it is possible to pull the vehicle body in any horizontal direction without resetting the frame if an additional clamping device 16 is desired on a particularly weak body structure the additional clamping device 15 shown in fig7 can be attached to either one of the outer sections 33 of.