I can't find any photos of it, but I found a couple references to it.
The Studio Tour website says:
Victoria Station had a trolley car from the parking lot up to the restaurant which was taken out when the tour expanded in the late 1980's. Victoria Station was open for twenty years, 1977 - 1997.
This artists rendition gives the flavor of the establishment which will feature a five story dome, four railroad cars from the "Flying Scotsman" and a two-car inclined railway to carry diners to and from the parking lot.
Artists rendition, 1975-76
The Studio Tour
This is from the Universal Studios Tour Brochure, 1986.
The Studio Tour
I ate there a couple times in the late 70's, once on Easter Sunday. I do not remember how we got there, but I don't recall riding the incline.
The Cable Car Guy website has notations on this incline, too, but no photos.
"Originally there was an incline to bring diners up a steep hill from a large surface parking lot directly into the restaurant. As I recall it was a 'Westinghouse horizontal elevator' and had a single car with a counterweight that rode rollers in the trackway passing beneath the car at midpoint. The car was user-operated by elevator-style pushbuttons and an automatic car door. I believe the incline ran for about 15 years before being replaced by an enormous parking garage whose top deck was level with the restaurant. Patrons simply rode conventional elevators to the roof level then walked a short distance to the restaurant."
I haven't checked anything else out on that site, but this page link has information and occasional photos on area inclines (Griffith Park?), including a couple that have been recently mentioned here.
http://www.cable-car-guy.com/html/cclafun.html