Need Help Quick. 400 stroker build or 440?

These open ended questions are fun for us it let's our imagination run wild but there not very helpful for you to make a decision with. People need to be very specific of what there trying to accomplish, is it for a certain race class, general street strip, street, daily driver, weekend cruiser, long or short distance etc.....
How streetable? Drop it in and forget, tinker a couple times a year, month, week, day. How much gear, cam, stall etc.. are you willing to live with. How much horsepower, what powerband (rpms)?
511-540 are usually built for very serious horsepower numbers 600-900 plus. You could build a sub 500 hp 540 if you want something that has a powerband of a truck engine. 540 need some serious airflow, take a 273 there heads are not know for huge airflow numbers but per cubic they out flow any stock non hemi mopar V8. A 540 would need to flow about 350 cfms to match a 273 per cubic airflow.
And don't forget you also need to get all this torque to the ground I'd be looking to build a 451-48? B engine unless you need stupid power levels :)