Unless you run a stock or similar to stock like a torker or something mild you should be able to get by with a drop deck factory air cleaner and a stock hood. I run a 454 std deck with a holley strip dominator similar to an air gap with a drop deck factory air cleaner and I had to have a std cowl hood. The top of my breather sits taller than the fenders and the cowl at the windsheild and still fits under the stock cowl hood. I could not use a cowl breather as it interfered with the hood closeing.