My thought was,based on the discussion here about 720 4x4 springs being flatter,stiffer & such a good idea for a lowered truck,that the same concept might also apply to the truck style rear axle in my 510 wagon. It's my daily driver,i often have a carfull of the family in it,+ whatever else we bring along,& my tools/spare paets,etc. I'll be doing the 280zx strut/brakes swap,& buying some lowering blocks from joel. The whole flipping springs deal sounds like it's not the best approach,& I'm not building a race car so the mono-leaf spring idea isn't really necessary for me either. I have to get my 521 down from the p.o.'s place to whwre I can get to work on it,get it to daily driver status before I can do anything to my goon anyway,so I have a little time for research.