Building my triangulated 4 link

I built a triangulated 4 link for my 73 Cuda, I used an Art Morison kit which is pretty much like the kit you showed. I triangulated the top bars because I felt this was a better way to go. The biggest issue is that there isn't a lot of room and you have to build a reinforced connection point for the bars. I have seen some guy actually run the bars into the inside of the car which kind of eliminates the back seat or at least requires some serious modification of the rear seat. That said, if you are willing to alter that sheet metal behind the seat it opens up a lot of possibilities.

One thing I will say is that at least in my case there was not big range of movement of the rearend up and down. I talked to Morison about it and they said that was relatively normal due to the design and the short bars.

I used the stock crossmember to mount the shocks but I removed it and redesigned it a bit as well as reinforced the crap out of. I used Strange single adjustable coil overs (because Morison sells them).