Did it on the weekend.
Ill take some pictures but basically had to weld 2 pieces of 50mm angle with nuts welded on the back and drill new holes for the front mounting points.
For the rear mounting points I drew an outline and cut out pieces from 5mm flat bar and welded to the original rear mounts and bolted.
The rail mounting points are around 60mm longer and 10mm wider than standard mounts.
These mounts are by far more stronger than the standard ones that break all the time.
I dont think ive ever driven a celica that hasnt had a broken seat mount atleast once.
I dont know how people can say they bolt in.... My seats were from a JDM SW20 and are almost like new.
Got them from just wrecking toyota for $250
Nisswreck wanted $400 for a pair...