Value of unknown 400 engine.

DO you know how to tell the difference between a cast and forged crank? It "could" still be a steel crank engine as the "kept on" doing that with trucks and especially trucks with manual transmissions. Find the parting line on the crank flange in the back. It will be on the very outside edge of the circumference of the flange. If it is no wider than a #2 pencil lead, it's cast. If the parting line is somewhere "around" 1/2" wide, it's forged. Course "I" would look very inconspicuously. LOL

Also, a lot of people think this 400 block or that 400 block is somehow "better". That's hogwash. One might be better "one way" and the other "another way" but that's splittin hairs at its finest. They are all about equal. Good luck!