If just a bow in it and not really a kink you can likely straighten it yourself. I've done so by just using a stake pocket on a trailer, drop it in and pull on it here and there, check and keep at it. Might only take a minute or two.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-