original Si steering rack dont use the extensions, the upper front A arms are different than early Pantera, the lower front Si Arms dont fit the former Pantera mounting chassis points , the shock mount points are also different .
also the rear swaybar mountings are different.
Please understand , I dont want to brake down this modification job, only try to explain that ca conversion from a GT5 (S) ( 9000 series) to Si specifications is not a bolt on job .
lot of modificaties are needed , an Si is not an upgraded Pantera , it's a total different car.
dont ask how I know this.
Simon