904 Problem- no go in D or 2 only Low

Hello
I thought about selling the Dart and someone came over today to look at it. Started it put it in Drive and pulled it forward. I got out to let them drive it and it would not go anymore. It only had reverse.

So they left and I fired it up a little later and it now has low and reverse.

Am I looking at clutches? or Could it be something else? The kickdown isnt hooked up right now; Could that have anything to do with it? I would think that in Drive it would still move since it goes in Low. Could it be some kind of adjustment?

Looking for your opinions. Thanks

Ok took it for another ride. I can start out in 1 and manually shift into 2 with no problems. I cant start in 2 or D though. NO background on car. I know it was raced before. (NOS, different converter, and fire extinguishers in the car)

Could this be a manual valve body? How do I tell?