ive got mr2 seats in mine pal just had 2 weld the feet off the end of the starlet rails on the end of the mr2 rails i aint sure about how 2 make it longer tho pal i just fitted mine normal lol unless u welded them in so they sit lower, n if you got some spare rails you should just be able to weld them onto the end of the rails to extend them, just move whatever makes the seat stop further back if that makes sence