Just to give you an idea of the rpm ranges. I had an engine similar to what you're building except that it had less compression. (9.5 to 1)
It had a solid roller cam with 250 @ .050 intake and 258 exhaust 110 LSA and .714 gross lift.
That engine peaked at about 6,000 rpm but continued to pull well beyond that.
That engine ran a best time of 10.36 in my 55 Chevy. (3400 lbs)
The engine in the car right now has a bigger cam, 265/270 @ .050 110 lsa, .737 gross lift.
It also has more compression, I'm guessing about 12 to 1
Anyway, that engine peaks at about 6,600 rpm and pulls through to 7,000 rpm.
It's run a best time of 10.10 in the same car.
The stroked 348 (437ci) I used to have in that car had the same cam except that it had a 108 degree LSA.
It peaked at 6,900 rpm.
On the street I wouldn't use anything much bigger than the 250/258 @.050 cam because the bigger cams are just a bit too much. (you won't need a ton of rpm with those cubic inches)
The lift on these cams is also a bit high for long term durability but I'd still shoot for something in the .600 range if your springs will allow it.
A solid roller cam is nice but Aubrey has some really good solid flat tappet cams that have lots of lift.
The one Jason, (Yellow Wagon) used in this engine worked really well. It's a totally different engine, stock stroke and ported truck heads but it made 473 hp.
http://www.348-409.com/forum/threads/yellow-wagons-409.18072/
It had one of Aubrey's flat tappet cams, 242/246 @.050 .595/.608 gross lift.
With your larger engine, you could step up a size bigger to get you in the 250 @ .050 range and get similar manners to what Jason gets.
I hope this helps give you some idea of the rpm range various cams will give you.
I think something like 250 @ .050 would fit your "knarly street cam" description. If it was ground with a 110 LSA it would be pretty knarly, and if it was ground on a 108 LSA it would be really knarly.
You'd certainly gain a little more top end power if you pushed the duration out to 260 or so but the loss of bottom end might start to outweigh the gains at the top end.
Hopefully others will chime in with their ideas.