Advice on navigating header clearance issues.

As stated above, make sure everything is installed correctly to make sure you absolutely need to dent it (and where). I had to dent my passenger header a little because at idle my engine shook just enough to contact my tie rod bolt. I marked the area with a sharpie and turned my wheels to give myself as much space as possible then just heated the area and a couple extra inches in each direction until it became red hot with a handheld map torch and gently placed the biggest ball peen hammer on the area and hit the back of the ball peen with a mallet. I took my time with it because in my head I wanted to make the clearance dent with 100 light hits rather than 1 strong one so to speak. I carefully moved the ball peen around to strategic locations and tried my best to make one big gradual dent. I had to go back and re-dent about 3 times because I hadn't made enough clearance but shes all good now.