Nice car! I too have a Basin Street Blue 73 Barracuda. Mine is a 318 904 with 8 3/4 diff. Blue interior. Few options. Same sort of condition as yours too. I plan to start the resto later this year. I bought goodmark fenders and plan to buy everything else from AMD.
Have you found a source for the correct headliner? The 73-74 material is a ribbed material sort of like corduroy. I have not found this type anywhere yet.
Nice job on your car.