Installing 3/4 inch spring relocating kit.

Cass uses a countersunk bolt head on the frame side. Part of the issue you run into with these things is the frame rail is not vertical. It's wider at the top and narrows/tapers near the bottom. Makes getting the mount tight to the rail tough.

There is a hole in the frame of my car which I just opened up a bit and extended rearward.

Built my own relocation hangers, need a couple of gussets and done