I agree that the gas and brake lines are "a little too close for comfort" near the rear axle.
Imho, what I like for that area is heat resistant fiberglass shield. But, that means putting it on before you connect up the brake lines.
SUPERFASTRACING 5 Feet Heat Sleeve Fiberglass Adjustable Heat Shield Sleeve Black 5FT X 6MM(1/4") for Car Wire Loom
https://www.amazon.com/dp/B07ZF8957W/
Heat Hose Fiberglass Wrap Shield Sleeve- 1/2" ID x 10'Black Adjustable Hose Heat Shield Spark Plug Wire fuel line heat shield Roll For Car Wire Loom cable Heat Shield Brake Line Cable Heat Shield
https://www.amazon.com/Fiberglass-Sh...dp/B07PJJZW6C/
I use a lot of the DEI heat shroud wrap in my cars.
https://www.amazon.com/gp/product/B000E267JC/
Design Engineering 010457 Heat Shroud - Aluminized Sleeving for Ultimate Heat Protection (with Hook and Loop Closure), 0.5" - .75" x 3'
But, for
horizontal runs, the Aluminized Sleeving will/can retain moisture/water/etc.
That's okay for wires and hoses, but not for brake or gas lines.
So, to protect a horizontal run, it's best to have something like a mesh that can allow moisture to escape.
Note that it can/will also allow moisture in. However, I doubt that many people are putting snow plows on the front of their Stang, and plowing snow in the winter.
Nor, drive their car much in the rain/snow.
Good luck.
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