I found it helpful to loosen up and lubricate the threads on the fender to cowl braces. I used the braces to pull the fenders into place. In the process I also made several versions of the rubber shim under the rad saddle. It can be helpful to have the hood attached to check that everything meets in the center. I have seen photos of trucks with the hood sheet metal right down against the fenders. If you use the correct rubber stops along the hood, there will be a considerable gap.
