75-76 Aluminum 833 4 speed Overdrive trans questions ?

Time to mention again that I have one behind a 1969 440 in a truck.

The factory rated the non-HP 1969 440 at 350 gross HP and a previous owner installed a mild upgrade cam and truck headers.
My guess is it's close to or slightly more than the 375 HP of the factory HP engines.

I have no idea if the shafts are bushed and I have no idea how they got the bell housing to work, but the bell is iron.

I also have no idea what gear is in the axle, but the axle is an 8 1/4 one wheeler.
It was an original 225 truck and I've "been told" it could have had anything from 2.76 to 3.55.

I haven't driven it in a while but when I was driving it about once a month, they were usually "spirited" drives.
I don't power shift in to OD, though.