An Orion transmission?

Hi, I bought this transmission mainly for the bell housing to put my slant 6 on my engine run stand. the transmission was in a mid-late 80's dodge truck(maybe) originally was on the column shift but converted to a floor shift. So, I say, well, could I use it just for conversation? It's very clean on the inside and shifts ok statically as it is. 2nd and 3rd gear I have a difficult time telling the difference in its "ratio", seems like they turn the same speed or so close I can't tell the difference. I wish the seller had the flywheel but alas he did not. I do have a 904 for the slant, but it's a toss up at this time what I really want to go with.' So what is it? what does the tag mean?
dne'
found this transmission:
https://www.ebay.com/itm/352850100460orion transmissioni.jpg

orion transmissionh.jpg

orion transmissiong.jpg

orion transmissionb.jpg

orion transmissiona.jpg

orion transmission.jpg

3 speed manual.jpg