Yeah, the leaf springs mounts to the frame are completely rusted off. I'll see if I can tell how rusted the frame is. I kind of just need something cheap to last me through the winter.
As far as the engine knocking goes, not sure, haven't left it running that long to find out.
Would I have to replace the leaf spring mounts? Or could I clean them up and weld them back in place? I'm guessing replacement is the best option... How much do those run?