A lot of people forget that the office tower and the Boulevard Hotel were part of a grander scheme by Westfield
Source: Anon. 1970. "Exciting William Street project under way". The Sydney Morning Herald, November 5: page unknown.
You'll notice above that the model is looking from William Street. Note that the Boulevard Hotel and the former Westfield Offices are at right. The scheme by Westfield comprised of:
*Two office towers - Only the tower (right) was built which was to house Westfield's offices.
*Motel (Boulevard Hotel) & motel
*Convention and Exhibition Centre.
The project would have been part of a greater scheme by city planners to turn William Street into a major boulevard, which simply has never come to fruition.
Had the scheme gone ahead, I think William Street would have been a more reputable address for businesses to be based and spurred further development on the city fringes, extending the Sydney CBD into Kings Cross.