Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Not all frames were made the same. Here are a few of the key differences.
Rear fender mount
Side stand mount
Rear crash bar mount
Early V700 models had a shorter top frame tube and - correspondingly - less space between the front tank mounting hole and the steering neck. Subsequent models had a longer top frame tube and - thus - more space between the front tank mounting hole and the steering neck. Be sure to read Fuel tank fitment on various frames for real world implications of this difference.
To measure this, I started by lining up two frames side-by-side. Lacking a precision jig, I aligned everything the best that I could visually. It should be noted that the remainder of the frame components (aside from the steering neck) matched very well between both frames.
Then I measured the vertical and horizontal placement of the steering neck relative to the front tank mounting hole.
The steering stem on the later frame clearly protrudes further forward than the early frame.
I could not detect any real difference in rake (nor should there be any difference).