You can make great power with a 470 (400 with 3.91 stroke) and the question becomes, how much HP and TQ do you need for a "street" car. I just dynoed my 470 and it had 658HP and 689TQ. It is going to be hard to get it to hook up on the street with that much TQ as it is, but will be a lot of fun.
There is also the choice of cam, heads, and intake that play a roll as opposed to just straight cubic inches. Putting the best heads you can afford and selecting the right cam for what you want it to be is what I found makes the biggest difference. I have seen 540 motors make less HP and TQ than my 470 due to heads, cam, and intake.
Good luck with your build!
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