/6 904 rebuilt never used/installed transmission and lock-up torque converter for 68 and up
Looks like any 904 I've seen from that view.... .the question would be about the converter.
If it was built for a 67 /6 it has the small converter snout. 68 til the end of the /6, had a larger one.
Looking at the pix again it would have to be 68+, actually 78+ as the pic of the input shaft appears to be stepped down as the lockup converter models were .. any more info here?