440's are cool for bigger cars, but for an A-body, it will put way to much weight in the front. I would build a 360 because they are cheap and all over. You can also stroke them to over 400 cubes.
If a stroker is a possibility i'd agree that seriusly needs to be considered. If is isn't i'd go bg block. I've had 2 440 darts, both 69's. There is really no drawbacks to having this setup and the people who have shunned this option have clearly shown they have little to no knowledge or experience to base their statments on.
