Agreed with Randy...

Keep such things as power window motors, small interior bits such as wood trim, and door panels are always good to have extras of. The great thing about having a near complete parts car is that since you never know what you might need, it will always be available right in your garage! Even little things which may have been replaced on your parts car before it became a parts car (such as vacuum line, etc..) can be valuable.

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Regards,
Aaron