727 No forward or reverse

Just an update.
I got a full rebuild kit with red frictions and kolene steels, bolt in sprag, billet servos, new bands, new pump gears, some teflon pump rings and new thrust bearing just in case. I hope Alto is good quality.
I took the valve body off to check it out from underneath the car.
The front drum looks ok. I hope to stay with it. A friend that is bringing me parts from USA could not take more stuff for me into his bag. If it turns out that drum needs replacemen = no more driving this summer. I will need to wait around 6 weeks for it to get decent shipping price so fingers crossed...

I found a big block 727 for parts in Germany, perhaps I will need to get it if my oil pump is trash or another hard stuff broken inside the transmission.

My trans is a 73 big block 280HP model, this is what I managed to find out from the numbers on it.

Anyway I will post info on what happened when I get the trans apart.
Positive info is that I found no metalic stuff in the radiator hoses or the radiator of the trans. I guess filter did the job.
I hope its not the converter. As I wrote before, what happened was very sudden. I had no slips or stuff before. At the same time the band must have fallen off and that was what I heard.
Perhaps I lost oil pressure?
The shavings found in the pan look like bushing shavings.

If my planetary gears are damaged what should I get?
Any suggestions?