Head choice for a street car should take into account the exhaust system. If you are going to run headers then make sure you can find a set that works with the angle plugs. If you are going to use manifolds then you probably want to run a straight plug head.

I think the 240 head is the best choice for your engine if you can find a header that fits properly. You might be able to fit a 383 Performer RPM under the hood but you'll just have to check it.

Another way to go would be EFI. A throttle body is shorter than a carb so that might help with hood clearance. Also, the engine will run better with EFI and it will last longer.