That thing will flex and squeek like a maniac without them. And never will stay in adjustment. The drivers side of the hood usually has a gap between it and the fender. Factory flaw. It gives the truck that bit of a snarl on that side. I've fought with mine for years and never had it perfect. If the truck is subframed it is that much harder to get the sheet metal all aligned.
This is about the best I ever had mine and it wasn't that close then.
The truck was sitting on a 67 Camaro subframe in front and it was hard to get everything just so. I am sure it wasn't.