What kind of intake? You will likely need to allow any brackets it might have adjust for the body being raised.
You don't remove brake lines, you remove brackets that hold them and prevent the body from being lifted.
Now you are starting to see why we suggested reading the posts others have made on their lift experiences and printing out the PDF files for both kits. The BDS instructions have pictures and steps missing from the PA sheets.
Think it through and use good judgement. A2B really messed his truck up doing the lift. After the wrecker bill, and the dealership repairs, he could have had the kit installed professionally , twice