Would it be possible to better triangulate the
proper location of each tower by taking the measurements from easily identifiable benchmarks under the hood (i.e. specific bolts, components, etc.)?
This would be much easier to do if we had the BMW drawings to work from, but since that isn't likely, maybe you would take some triangulating measurements to use as a reference. As a note of caution, these should only be viewed as indicators and should not be considered definitive.
2003 Alpina #480