As Carl & Flyerncle have said, 120mm from the hole center to the outside edge of the chassis rail, if you weld the brackets to the side of the chassis rail ( TR1 & TR2 ) just above the upper shock bracket it will mean you don,t have to cut the nose cone,
if you position the brackets as above, give some thought to how you will route the wiring BEFORE you weld them into place
cheers
andy