i'm pretty sure different bolts are used on the hydraulic in maybe a different mounting spot? couldnt tell you for sure as my car is buttoned up right now and my indy did it, i know that i bought the complete conversion kit from ecs (just has tensioner and some extra mounting bolts) and it went right on for my mechanic.

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards