Just playing devil's advocate here, but unless the car originally had a big block I would consider a stroked 351W. Parts are less expensive and more plentiful.
You can get big block cubes (427) and save a lot of weight and space in the engine compartment. That thing will be very nose heavy with an FE.
Don't forget to think about
suspension changes for that weight if you drop a big block in a car that didn't have it originally.