727 No forward or reverse

Sorry to say, but that looks like band and bushing material mixed.
In any case that's quite a bit of random metal, and if it was full auto probably wouldn't even shift due to that.
It'll need a converter also since all the metal has been blown through it.
Fluid looks burned also.

I get my trans parts from a place online www.transpartsonline.com
They carry good products and have great prices.

You will need to tear that thing down and find out what hard parts need replaced, and since it's very likely you will need a front drum (where the band rides) anyway you can get a billet unit. (so it doesn't explode in a burnout and take your legs off)
A bolt in 16 roller sprag, and almost certainly a new pump.

The rest is a full rebuild kit with bushings, Kevlar or kolene clutches and bands.
Billet servo's would be a good idea.

Rinse and inspect planetary sets as well for damage.

Other than that you'll need some cleaning brushes and a good amount of solvent in a large container to wash metal out in.

OR,,,, you could buy one already built and ready to go.

WHATEVER happens, make absolutely sure the cooler lines get flushed out well or it'll all happen again in 15 min of running.