Heating coils is never recommended but if you are carefull there is a way of heating them to relax the top wind so it lays flat.
get your coil in a bucket of water with just the top part exposed from the water, the water will take the intense heat away from the metal coil submerged which will stop heat distortion and stressing the coil so it wont fracture. Use an Oxy-Acetalene torch to gently heat the top wind up, keep the torch moving and dont concentrate one spot (no matter how tempting it is) when the whole top wind is glowing red hot you're almost there, keep applying the heat and get someone else to start to apply pressure and slowly and surely the top wind will start to drop, do this until its in the correct positon and then just leave the coil to cool at its own pace, dont douse it in cold water.
This method has been used for many many years by the Kustom boys long before pre-fabricated coils were available
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