One thing to consider is the height of a 3 link on top of the diff. You really need to design it so the bolt going through the heim is vertical. Otherwise you side load the being and they are not meant for that type of load especially to that extent. You will need a elevated area of the floor so the upper wishbone can come through the floor. Unless you limit up travel, but what's the point of decent suspension only to limit it. It will only droop so far with stock wheelbase driveline lengths. So taking advantage of up travel is you only option. I personally like 4 links. Easier to deal with 2 straight links than a wish one plus it is much much easier to adjust your thrust angle.
https://www.instagram.com/p/BWjIEujlIfe/?igshid=1j7wqsy5zcou2
Use radius arms on the front and take advantage of that making your front axle a sway bar. Otherwise you be also needing room for a long travel sway bar at addition expense.
