1965 dart gt spring question

Progress report: I was able to get the car off the ground and the shackle flipped back down, but even with the axle jacked all the way up I couldn't even get the shackle back to the 90 degree position. I have a feeling I need the extended spring mounts, but I can't figure out which ones I need. Anyone how has ss springs happen to have the part number for the extended front mounts?