I have received a set of new ball joints from Summit Racing, They seam to be a bit stiff but after I cleaned them out and re greased with new grease they seamed to free up quite a bit. I really like red line products so I use them. I am sure other manufactures products work well also. Just stay away from the 3 dollar stuff. Look for a temp range of at least 400F. This stuff I use is good up to 500F. Why? the heat generated by the rotors is very high and the ball joint is very close to that heat source. When I removed the original ball joints the rubber boots were hard and cracked from the heat and the grease inside looked over heated to me as it was dry and seamed to have been overheated. I will check these after every track weekend from now on.
On to the fitting, The K6136 is about 3/16s taller than the OEM piece. I will make a spacer to fit between the mounting plate and the A arm. This should place it in the original position. I also ordered a 7 degree reamer to clean up the stud hole in the plate on the bottom of the upright. The original placement left about 3/32s inch of threads in the hole. I would like to have the entire stud bearing surface in the hole with maybe a single thread left to be pulled into place as the bolt is tightened. More on this as I final fit the ball joints in the assembly.
I have contacted RCR about the availability of the spherical bearing retrofit piece and would be interested in at least having a look to see if I want to re fit them into my car. More on that if I get any info from RCR.
If anybody has pictures of these please post them.
https://www.redlineoil.com/cv-2-grease
https://www.summitracing.com/parts/mog-k6136