I did a 4 link in the rear last year and moved the tank from where it was to sit like a jeep tank , partially tucked up in the cargo area. While it took a little space out of the rear, it's working great and the flex that I have is incredible.
I'm doing a 3 ling long-arm sas right now and there are some challenges as I want to have more up-travel than is currently the case, but the coil overs up front and moving the axle further forward should help to resolve that.
Oh.. and the four link in the rear is double triangulated and it rocks.. I literally hit an obstacle last year where I was at full extension in the rear and had full contact nonetheless.
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