My '91 740 wagon has the sagging front power window problem frequently mentioned and after research and part purchase from IPD to replace the blue regulator "slider blocks" I opened the door panels to find that my care does NOT have these type of blocks but the "tuning fork" with plastic washer and clip design--nowhere are there these blue blocks.
Am I missing something or are these in later cars or something??
Thinking the regulator arms are loose where they intersect in the middle so I may replace anyway but kind of confused about these blocks.
Thanks.

The small blue blocks started in 93 I am pretty sure. I had one that had them. Earlier cars had the tuning forks.
I had some luck swapping forks from pass side/less use, cutting some from rear doors for the shorter ones, etc. Also moving the assembly a bit by ovalizing the mount holes.