Great advice again, thanks.
The curved section on the bottom of the complete inner cowl panel does seem too narrow in front. Would flattening and rebending the flange work? Or better to use the short panels?
Glad you asked!
I beat, cut, cussed, beat some more on one of the poorly formed full replacement panels to make it fit (never again). Then I discovered that the short panel was a great fit. For the other side I cut off the bottom half of the full panel and welded the lower half-panel to it. It fit like a glove with no beating!
Carl