Street Cam Suggestions for a 340?

I'd run something like a Voodoo 60403 (old number)

This is what I have, great street cam. 15-16" of vacuum at idle and works with your Air Gap RPM range. You will likely need a converter with it. My dad has the next size up in a 440 in his Coronet and its not bad on the street either but we both have 4 speed cars and 3.91:1 gears.

https://www.lunatipower.com/Product.aspx?id=2343&gid=287

Step down one size if you want to keep the stock converter, manifolds and 3.23:1.