W2 Heads for a 340 Block...

I think I am actually going to end up using a 360 block, I have been looking around and it just seems that with me trying to keep it under a decent budget I can come across a short block 360 for much much less. I am going to be using the six pack hood, so with that scoop it should give me the required hood clearance for almost anything, what kind of lift and duration do you think would be good for a motor like that, keep in mind I want to get the most power I can, but I want the motor to be streetable also.

You need to build a combination of parts that work together in the rpm range you want. The 360 is a good move imo, and is easier to cam.
When I first did my W2 headed 360 in my duster, it was 11.5:1, I mixed pump gas and race gas, solid ft. cam, victor intake, 950HP carb and stock rods, crank and KB 107's. It pushed my duster 119mph very first time out. 60ft. was poor due to me using a street converter and having ladder bars simply dead hooked it so the engine was dragged down severly at launch.
When I decided to go with an 8" converter that's when the car would leave well (1.40's).

Tell us what you plan to do with the car, what parts you plan on using, and a general idea of what you expect from the engine performance.
Brian