Not all studs are swagged in place.
On larger trucks they’re usually just pressed in, so easier to remove and replace.

For sure figure out what you’re working with before deciding on a plan for removal, if necessary.

•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-