So I recently aquired these two blocks and I am trying to get further information about them.

I have a Forged Crank 68-75 block, side casting number 2806830-7. The number stamped on the deck beside #1 cylinder is 5W 225 4785

I also have a Cast Crank post 75 block and the side casting number is 530-11. The number stamped on the deck beside #1 cylinder is 9 225 R6 29 2E

Can anyone tell me a little bit about these blocks like what year they are and what car/truck they might have come in?