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Nissan 84-89 300ZX(Z31) Adjustable Rear Camber Mod This page made possible by Ken85T. Adjustable rear camber is accomplished by slotting the bolt holes on the rear trailing arms for the outer pivot bushings. Essentially you duplicate the setup for the inner bushings, which allow adjustable toe-in, except rotated 90 degrees. You will need a pair of the inner pivot bolts with the off center washers. These bolts have a larger diameter than the outer pivot bolts so you will also need to replace the outer pivot bushings with inner pivot bushings. You can do the slotting using a large round file with a coarse surface (bastard). File and 1/4" square bar stock You need to carefully lay out the slots using a square up against the crossmember bushings mounting circles. Layout slot with square. All layed out If adding the adjustment is for the purpose of correcting an excess negative camber problem (tires tilted inward at the top) you make the slots in the direction shown only. If you don't have a camber problem and wish to be able to dial in more negative camber (for racing applications) you would file the slots in the opposite direction. When filing the slots you must maintain accuracy. Check the slot width often using the pivot bolt. Excess slop in the slot will cause alignment problems. Make the slots 1" long. Filing Filing Done with slot Completed slot Cut steel blocks out of 1/4" square stock, each about 3/4" long. To get a good fit the blocks may require a little grinding. Position the blocks using vice grips. Weld the blocks on either side of the slots. The blocks should be positioned so that the off center washer just fits between them. Only weld the back and side surfaces, not the surface that the washer contacts. Make sure the welds are well burned in and with a large filet to provide support. Holding bar stock with vice grips ready to weld Done welding (outside view) Done welding (inside view) When assembled, turning the pivot bolt will force the bolts to slide back and forth in the slot, changing the camber. Assembled (outside view) Assembled (inside view)