Don't use the Campy hub, especially if you're a big guy - they're absolute rubbish. They don't include the main benefit of modern cassette hubs - a properly supported spindle. The right hub bearing is in totally the wrong spot.

Get a Shimano hub on there, and then you can use Hyperglide cogs which also crap on Exadrive. Shimano 7spd spacing is as near as dammit to Campy 8spd.

BTW, I'm not a Campy hater by any means - but the two things I mention here, Shimano does way better... my dream spec would be full Record except the rear hub.