Something to consider is if you can bring the alignment back into factory spec at the increased ride height. I raised the rear of my wagon past stock a few times for giggles with the SLS sensing rod, and you start to get some positive camber. As far as I know the rear end is unalignable until you add a kmac kit.

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1981 300TD 4 speed manual
Euro bumpers, zender valance and skirts, H&R springs, billy HD's, leveled sls, real AMG Pentas 16x8 et11, vdo boost/egt gauges intergrated into ash tray, eurolights, led 3rd brake light