You won't need a lot of cam to meet your goals. Take a look at this 383 with Vortec heads.
http://www.superchevy.com/how-to/578...e-engine-test/
With the "Hot" cam
http://www.superchevy.com/how-to/148...-engine-build/
I think something in between the two would be ideal such as
http://www.compcams.com/Company/CC/c...?csid=186&sb=2
I'd run 1.6 rockers on the intake and 1.5 on the exhaust, and step up to the premium beehive springs and retainers. Even with the 110 lobe separation this cam would be compatible with your TBI.
I think the larger comp cam Lionel mentioned would be challenging to tune with TBI. I have a TBI 383 with a 223/228@0.050" mild hydraulic flat tappet and it needs 13:1 afr at idle and less than 14.7 below 1,500 rpm to run well. I've tuned a port injected 406 SBC with a Lunati 219/227 efi hydraulic roller cam. It's on the edge of being able to run closed loop idle. It runs smoother at 13.5:1 idle, but can get by at 14.7:1. Port injected can handle more cam because fuel distribution is better.