There's usually some space between the outer cowl sheet metal and the reinforcement behind it. Maybe get some heavy putty and stuff it up in there. That would help stiffen up the cowl itself. That assumes you don't find anything else that might be causing it.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.