So after a busy day of install, here are the facts:
1) There is nuts welded on to the stock mounts, dunno how we missed this in our measurements. Basically all this meant is that instead of having a complete sandwich, the sandwich is against the nuts (3 in my case as we welded nuts on to the top hole). Because of this, I would suggest going for slightly longer bolts, as the ones we got reached with the nut but only just.
2) For perfect fitment we had to grind off a bit of the top edge on the backing plate. This is due to small working area at rear of stock mount. You could probably get away without doing this but we did it anyway.
I think that's all, here are some pics, It felt like I took a lot more, but obviously not!





