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If using propane start from way back and wave the torch back and forth to prevent overcooking it. Slowly move in on your target and when you get to the point where it starts to shrink up hold there, still waving the torch side to side and take it easy. Of course you want to be wary of any surrounding parts that are in the area and don't cook them. You can use aluminum flashing or old license plates as a heat shield to protect the other stuff.
The 10-12 is easier to use and will do them all, but it needs more effort to insulate with shrink tubing. I showed in the picture that I put a stretch of 1/8" shrink tubing over the insulation to build up the diameter, then 1/4" tubing fits over the whole wire and crimp.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.