Obviously you have had your engine torn down but they did make blocks with your casting number with 4 bolts. Your front pad number would matter more telling you what that engine went in. If it is a collector car then it's worth something. The crank is worth something especially if the number mates to a collector car.

As far as using it I would look at the heads. It's easy to build a nice mild street engine with a 2 bolt 454 cast crank with flat pistons and use the early 396 closed chambered heads with oval ports to get a CR of about 9.5 to 1. Those engines are easy to get 1 hp/ci making a great street motor.

If you want a monster motor then just buy a large bore tall decked aluminum block and drop the crank in you want. Then build according to how many revs, how much power and whether you're going to go forced induction or nl aspiration.

But you can easily make over 400 hp and 400 tq with the 396 you have using resized HD rods with good ARP bolts. Just get good heads for the street.