Unless you’re living in the s, your street machine has a hood. And unless you have a 5.0 Mustang and can open the lid really wide, the hood’s gonna have to come off to remove the engine. You’ll mess up the alignment unless you mark the hinges so the hood can be bolted back on in the same place. You can scratch marks with a screwdriver, outline the hinge with a marker, or be more friendly by using masking tape, as shown. Once the hood is on, ease it down to make sure it fits correctly or you might chip the paint. Also, your new engine might have a taller intake--don’t put a zit in the center of the hood with the carb stud.