1968 Plymouth Barracuda Fastback (old school build with a new school feel)
Here are the 5/8" offset shackles from Ruffstuff for $11 each ($44 total, plus $8 shipping) that I bought to make the spring offset kit. I then altered them to be similar in length to the stock shackle length. All said and done, they mimic the original design pretty closely.
EDIT: They did not work. They were too thick in both directions. I can modify them but I wanted to get the rear back in. I will trim them out and retry them at another point in time (if I need them)
And they were turned into this: