Slant 6 Block

I got two slant six blocks and a 904 from RustyRatRod and I'm attempting to dig up a little info on them.

I got a cast crank engine, here is the number on the side.
View attachment IMG_1563.jpg
And the number on the deck is 9 225 R6 2E

The forged crank block side
View attachment IMG_1564.jpg
And the deck number 5W 225 4785

Can anyone tell me what kind of cars these came out of and what year they are?

Also where would I find the ID numbers on the 904 transmission? I would like to know the year of it as well.