Sounds like you have a handle on it, Chris..... I've ran a couple blown engines, but nothing that was built for economy!!!!!

For streetability and no problems finding fuel, keep the compression down around 8 or 8.5. Heads need to flow good, especially the exhaust side. For the cam, I'd do the cam card sheet with Comp or one of the other cam builders detailing exactly what is going in the engine. A friend of mine is running a blown BBF with a TBI unit on top of the blower!!!!! Don't know the details on the electronics, other then it came from FAST and has many built in features including a spark retard unit to pull out some of the timing at higher RPM.....

If you want to really get crazy on displacement, there are some aluminum mountain motor aluminum blocks that will put the cubes around 800 inches and the horsepower out in the twilight zone!!!!!! Depends on how hard you want to search (there are used blocks out there, but be careful) and again, how much you want to spend.