No, you know how most of the perches that have a threaded part perpendicular to the shackle hole have it sticking straight out? Either SoCal or Pete and Jakes carry them so the threaded part is angled to the hole so that when you install it on a wishbone that tilts inward at the back the spring shackle isn't on a bind. I'll try to find a picture to post of what I mean.

Don