Inboard spring kit.

I've done as much searching as a could and couldnt find my answer.

The spring relocation kit pictured came with the car when I bought it. I've seen somewhere but canr find it anymore that the rear shackle tube goes into the hole already through the frame that I pictured below. However the instruction show to weld the tube to the bottom of the frame rail. Was that a different kit that i saw it going through the frame?

The instructions also show three holes for the front mounting but there are no holes in the provided boxes. Any insight on this?

I've also seen talks about offset shackles. Would that be necessary for to gain even more clearance for wider wheel and tire clearance? 20200415_002626.jpg 20200415_002737.jpg 20200415_002748.jpg 20200415_002810.jpg 20200415_002947.jpg 20200415_003346.jpg