I used electric life window regulators for the front doors, they bolt in and you can use the stock door panel. For the rear quarter windows I used the kits you have shown. The rear panels were modified to hide the regulator drive assembly, but for my purposes it didn't matter because I was re-upolstering the car. The "L" shaped bolster hides the motor assembly. You cannot put the motor inside the body because it will interfere with the window operation.
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