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I think it depends on what year intercooler you get, there are different sizes,
I pulled this information from 6.0 liter intercooler swap for the 7.3 Ford Powerstroke install article.
One thing you should be aware of before you start taking stuff apart is the 6.0 IC inlet and outlets are not both the same diameter as the 7.3’s and the tube lengths are just a bit different as well. The easiest way to correct this is to purchase a transition hose, 3x3.25x8 and another 3x3x8. It is my understanding that some later ‘05-‘06 IC’s have a diameter of 3.5 on the hot side, so you may want to measure your IC before you order your hoses. You don’t actually need 8” of hose, but it will allow you to make the gap in distance with no problems at all, additional it gives you plenty of room for flex, and insures a great seal.