I have the Mexico SS springs on my 70 Bee. Once I got everything bolted together, front bolts in the upper hanger holes and weight on the wheels, they set just right, but I will say that pinion angle was all screwed up and I had to put spring perch wedges in to get the rear yoke back in line. I've seen INSANE variations in SS springs. Dave Pelletier's 70 bee gets the award for the craziest arch I've ever seen. No kidding. He had about 6 inches between the wheel well and the top of the tires!