Unbelievable, isn't it - some manufacturers still charge extra for shock absorbers!
At least they gave you the mounts - put 'em on. They're worth it.
I'd recommend downloading the operating and maintenance manual for your axles and brakes from your axle manufacturer. I know Dexter has these available for download in pdf format.
2016 Ram Longhorn 3500 Dually 4x4 CCLB, 385/900 Cummins, Aisin AS69RC, 4.10
2014.5 DRV Mobile Suites 38RSSA #6972
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