Edny, whats this your saying? I too have a diskbrake S10 rear axle and mine is the forward caliper mount and if what your saying is right, you saved me a ton of work . I was worried the calipers as they are now, were too close to the frame and might somehow touch so I was going to notch the frame for clearance. If I can swap from side to side, the problem is solved. I would go look now but it has been snowing for the last 2 days. Starting to wonder if spring is still coming .
3WBill