I want to install a new seat upholstery for my '72 240 and I wonder if anyone has any experience with those kits they sell on the net for around 200$. (e.g. Too intense). Any suggestion ?

http://www.classicdatsun.com/new/240_interior.html

These were the seat covers used in the Nissan Z store project several years ago. I have an extra brand new set in black if interested.