The Citrus Bowl had the ACC champ that year and refused to let GT out of the contract.
Found an interesting article on that. We could have played in the Orange Bowl against Colorado if we had been invited instead of ND.
Despite its paltry payout compared with other New Year's Day bowls, Orlando's Florida Citrus Bowl could have a significant impact on the national championship race. That's because of the bowl's...
www.tampabay.com
Under a unique arrangement, if the Citrus Bowl can pit No. 1 against Nos. 2, 3 or 4 in the UPI rankings (Virginia is currently ranked fifth by UPI) and not involve an ACC team, then it is not required to invite the ACC champ. Conversely, if the ACC champ is ranked No. 2, 3 or 4 and has the opportunity to play the No. 1 team in either the Sugar, Orange or Cotton Bowl, then the ACC team has that option.
Interesting that they were using the UPI rankings for this determination even if we were #2 in both AP and UPI polls at the end of the season before the bowls.
Another paragraph later in that story is interesting regarding FSU and the ACC:
Speaking of the ACC: When Florida State joined the ACC a few weeks ago, people wondered why the Seminoles would want to join such a weak football conference. But with Georgia Tech moving to No. 23 in the AP poll, there are four ACC teams (No. 2 FSU, No. 4 Virginia, No. 16 Clemson) in the top 25. Add No. 9 Miami, which wants in the league, and you have five in the top 25. Including Arkansas, there are only four Southeastern Conference teams in the top 25.