Slant 6 K-Frame = LOTS of Clearance

JD Mopar, What A/C compressor are you using in the picture you posted?
The A/C lines look to have a fairly unobstructed connection area. the Mopar compressor being sold as an accessory to the crate Hemi (Part # 68202994AA) looks to have the connection points for the lines in a different location from what you pictured and it looks like it will interfere with the header. here is your original pic, and an image of the new Mopar compressor for reference

View attachment 1715202471

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JD's compressor looks to be the same factory one that is on my 06 6.1