If you look in the tech archives you'll find this article that I wrote for Mopar Muscle magazine. I used a pair of 500 cfm Edelbrock carbs on my 505 engine. It made a little over 600 hp and it had a super smooth idle. That was a very nice combination which would've worked pretty well in a street car. It had a little too much compression for pump gas but fixing that wouldn't drop the power too much.

http://www.popularhotrodding.com/tech/1007phr_big_block_mopar_engines/index.html