Join Date: Nov 2014
Location: Marshfield, MA, USA
I'd do at least the bottom... I'd do the top as well because it doesn't cost much more than doing only the bottom, and it can be done using the original "spot weld" method. If you replace the bottom only, you'll be filling the holes you drilled in the top rather than a true spot weld. The cowl is structural. Do it once, do it right.
I didn't have the option of "either/or" on my 69. There's no patch kit available and the only cowl replacement was top and bottom, and I'm glad it was the only option.
I welded the bottom in, primed it and painted it, but masked off the lip so I'd get a clean weld when I did the top. Granted, Ford didn't paint the lower cowl, but you can't see it once the top is on.
Heck, you've got it apart anyway, and Dynacorn does a really nice job with the repro parts. Might as well do the whole thing.
69 Convertible, 351W, T5, E-Brock Performer 351-W intake, Performer Plus cam, Holley 4160, power assist, dual exhaust, 4-wheel manual drums.