Too close to header?

[Low69CST]

it looks like your headers are ceramic coated. I've been told that is enough of a insulator that it keeps the heat inside the tubes and not much radiates in the engine compartment. However, I have heard of brake fluid boiling. I changed my lines like Mario to outside the frame and bought some insulation and wrapped the lines. I think the closest I get is about 1.5"-2". You may want to look on the other side under the truck. Where the rear line goes from the crossmember to the pass. frame rail was actually touching my headers. I had to change them around to the outside the frame rail.