Product review (5 stars): Flawless install on Series 80
I have a series 80 (66812690) dryer and all parts worked after putting it back together. It also gave me a reason to clean out the motor and lint. I suggest you have an air compressor and vacuum handy when replacing everything. Also, I read through other reviews and went ahead and saved my old rollers and pulley just in case I need them in a pinch.

I did the whole install in less than 30 minutes.

This Video at the bottum was instrumental for me: http://www.repairclinic.com/vwo9/PartDetail/Maintenance-Kit/4392065/587636