A diesel, at 125 MPH... must be down hill with a tail wind...
I had 190 callipers front and rear fitted to one of mine with drilled and slotted discs and green stuff pads...
It was nothing short of brilliant...
that was on MGR brackets..
I stripped and derusted the callipers and other parts in a electrolytic bath before repainting and fitting new pots and all rubberwork, new pins and retaining clips.
I also used braided hoses. I did not go for the 190 master cylinder though, I did have one to hand but not the larger servo, so it never got fitted.