After looking at all the angles and bends in the hood, it was apparent that I wasn't going to just be able to weld this extension piece on the main hood. The ridges on the hood did not line up at all so the extension piece was going to have to be sectioned to get the width I needed.

After all was said and done the extension was sectioned 1/2" wider to get the ridges to line up. Aside from the 1/2" fill piece needed I cut a piece 2 1/4" wide by 25" long to fill the gap where the old louvers used to be in the extension hood section.

I still have to fit the hinges and get the hood curve to match the cowl so I still have a little bit of manipulating to do!