The later Tri Power and Patriot machines have the bracket on the top slide, so its adjustable in place. On early machines like yours, the clamp bolts on the bracket are in line with one of the T slot grooves on the table. With some measuring, you can find the location and drill 2 holes in the bottom of the groove and access the clamp bolts with an allen T handle wrench. Its a good idea to tap the holes for a plug, so stuff can't flow down onto the screw. On the thrust bearings be sure the race with the larger diameter always goes against the fixed bracket.