If your going for the lowest possible way, it would be to have custom brackets made. If you have someone make it w/o sliders it would be as low as you can go. I feel like this question would be better suited under the Road Race/ Auto X forum.

 

I’ll open a thread in autoX Thanks
Btw i need to put sliders but if i use oem ones should be of another seat coz i want to keep the entire oem seat

 

you can also just scroll down a bit in the ef section here
check out my build thread (Marcos new work car 90 sedan)
to get a idea of what you would have to do to make your seat fit in the ef
useing the oem rails
the info and pictures you need are on page 5