mod interior fastback barracuda? any help?

Ive located a 68 or 69 fastback barracuda pale yellow in color with the side stripe it has Mod interrior green and yellow in it i didnt get a good chance to see everything about it and dont know what size motor it had before the lady ran me out of her crumbling old lean too but i did see enough anyone have any idea how many fastbacks came with that option? i only remember the coupes coming that way? any help please?