They are very customer friendly from my experience.

Viking was nice enough to help me put together a double-adjustable shock to fit a Dodge Aspen on the front for a "Stock" application. F/M/J body cars have the shortest shocks I've ever seen on a "regular" car. It was a close fit and I had to add some bump stops, but they've worked well so far. I just have to get more runs it. I think Calvert has something. But even OEM HD shocks are too soft and nothing that's adjustable.