85 GMC Sierra "Scarlett"

[JohnJ@RideTech]

Ok, sorry for the slow response but I think I can help out here.
Ken has a pre-production prototype.
The bar that Ken has is a larger diameter than our previous design. Due to the increase in diameter, the end treatment had to be modified to work on the existing a-arms.
The new bar was designed so that these trucks can be pushed harder through corners, decreasing body roll and improving overall feel and control.
The change in PosiLink (end link) mounting points was solely due to an increase in tube diameter and that is why the MuscleBar is aesthetically different.
I hope that helps clarify things.