Jim, I hope you can find the serial number on the frame for an accurate date of manufacture or perhaps the component dating can help you.
The '89 and '90 Ace frames were chromoly according to the specs and not hi-tensile. The Classic Fuji website only goes up to 1991 and there wasn't an Ace in their line up that year. Perhaps the later years they re-introduce the Ace and changed the frame material. I'd love to find out.
The Ace was quite a nice bicycle back in the middle '70's, especially the '75. It was the first Fuji to come all equipped with Shimano Dura Ace.
http://www.classicfuji.com/1975_05_AceB.htm
Check out Robatsu's Fuji blog:
http://nihonmaru.blogspot.com/
He posted some of my photographs of my '76 Finest that had the full Dura Ace switched over to it when it was originally purchased. Plus he's got other great Fuji info.
Feel free to PM me if you have Fuji questions.
Scott