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The perches and shock mounts on the 9" were shot, so I cut them off an bought new ones. Setting the pinion angle via perch location was pretty easy in this case: I was setting it up for a C.V. style shaft. Basically, with a CV style driveshaft, you want to point the pinion at the T-case output. I bolted the axle up with the perches sitting on top, pointed the pinion at the T-case yoke, and recorded the angle using a $6 hardware store angle finder. Then I slid the axle out, set the perches centered on the axle the appropriate distance apart (pin-to-pin measurement on the leaf springs), set the pinion to the predetermined angle, and tacked the perches on. I remounted the axle just to make sure they were right. I tacked the shock mounts on with the axle underneath the truck, using a rear shock from my Ranger to assist in placement. I then brought the axle to a welder to weld the perches and mounts on, and also had him weld up the track bar mount while he was at it.
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