surely a spacer plate is gonna be needed too make the caliper go out far enough to count for the bigger sierra disc?!

I had Rs turbo calipers and escos discs from godspeed on my xr2i which cam with a spacer plate, i went to fit it all onto the gfs mk4 escort cab and found the plate needs to be spaced out even more to allow the escos discs but i should be able to get away with using thick shims for it.