Garage find 340 4 spd Dart... keep it 440/727 or go 340 4 speed as OEM ?

They built around 1700 73 4sp 340 Sports .
I used to know the exact number when I had one . That is pretty rare ! Considering Chevy sold 66,000 SS Chevelles in 69 !
I would put it back to 340 4sp... maybe a mild build and an OD 833 with 3.91s so you could drive it everywhere !
Mine was B5 but B3 is even better !

You said "all the tags" is it a 2 tag car ?