I started with Google Earth and created placemarks at two intersections (Cambridge & Grove / Cambridge & Staniford). Using the GPS location of the first placemark, I manually geolocated the model at 42.361142N, 71.068739W. Next I imported the high-res map of old Boston and used the distance between the two intersections to scale the model. Then I imported a screenshot from Google Earth and aligned the map with the placemarks to get the North/South orientation corrected. Lastly, I added a building (garage) and exported the model as a KMZ.

Importing it into Google Earth gives this:

The model is too large to post here, but you can download it from the Warehouse:

BTW, the Warehouse page for this has a “Geolocated … Yes” property that gives this:

Hope this helps