unless you like tearing your hair out with fabrication do not use stock ek1 seat rails for after market seats. the rail is part of the pivot on the stock seats. the seat belt side of the rail isnt flat like most oem seat rails so there is nothing to bolt the seat onto. if eg/dc2 rails can work with just one mount fabbed up use them. i recently put seats into an eg and ek using factory rails and the eg was much easier.