[Tx Firefighter]

I've been cutting the gutters on the control arms for like 20 years now, on a lot of trucks. Never had an issue.

Why not trim yours until they clear ? Drive it, enjoy it, and if it makes you nervous, every time you're under the truck, look closely for signs of cracking. My money says it won't ever crack. Worst case, you're already leaning towards buying new aftermarket arms anyway. Its not like its gonna fail catastrophically. It would begin to crack if you weakened it too much.