I have seen pics of a couple other Birds both '55's and raced in '55. One was in Shreveport(?) Louisana and was in a stock car race on a dirt oval. It was wrecked in the race when the rear axle bearing retainer failed. The other is just a picture of a bird slogging through a very rutted dirt turn at what was supposedly a sports car race somewhere in Virginia I think. This was in some obscure magazine or book that I can not find now.
It looks to me that there are only two T birds in the link posted by Seppo The Black '55 is white in the later pics. and is pictured as late as '58 because the plastic scrub next to it is a '58. It appears to have 3/2's with no air cleaners or hood scoop. That car must have had some history being raced in Chicago and Daytona. The other car is clearly the Battle Bird with the Yblock and Hilborn FI