I bought some from autozone for an 86-up. The spring end are a tad wider than my springs, the frame mount end was a tad narrower than the shackle (I shaved the bushing). It sits right at 2" lower than it was. Only minus that I can thing of is I had to notch the bed on each side, no biggie for me though.....They are level with the bed floor.

Here is the before. I will take an after tomorrow in the daylight.