Turbo 400 transmission Identification FR

[XXXGoldL34M20]

Today I took this out of a 1970 Chevelle SS, of course it is not an original Turbo 400 for a 1970 Chevelle SS, Looked everywhere on Google to see if "FR" comes up but no luck.
Anyone know what it is for before I trash it ?
See photos.

[dvss1]

Fr= 1981 turbo 400 out of a Canadian 30 series truck. Actually a great hd transmission.

[Big Block Bill]

X-2 Originally it would have come with a higher stall speed 6 lug converter.

Bill

[Canuck]

FR stands for French.