Now that you also have an E-28, maybe you can do a comparsion? Are the eng mounting points the same for the 3.5L engines between the E-34 535 and the E-28 535? About 1 yr ago, I place the later model 3.5L eng, wiring harness, ECU intake manifold etc in my E-28 535. Using various net sites, I used an 88 635Csi eng. The mounting points were identical to the early model 3.5L. Most sites stated that the E-34 535i has different passenger side mounting points. I was able to check one 89 535i and the drivers side mounting points are identical. However, I couldn't complete the passenger side. (Broad daylight and the cars driver had to be elsewhere.) Here's the confusion factor, Some people have put in the E-34 3.5L into the E-28 with no mods; however, the work was done by a shop and the owners were not aware of any details. You seem to be a guru of the E-34. Are you able to tell if the passenger side eng mounts are identical bet the E-34 and E-28 535?