Here's my carb'd / D1SC BBC. It has a 6" cowl hood that leaves lots of room; I could go smaller by using a different manifold & carb bonnet, but my Firebird needs some loving before I go buck-wild on this one. This is the 'street setup', with a bypass valve. For the track, I use a BOV (it gets more boost & controls it better above 10-11psi).
Jeff