Offset spring hangers and shackles....

That’s fine if you just want to run drag radials I guess. I just assumed he actually wanted to run street tires.

And either way the quarter clearance would be better on a slightly narrower rim. Depending on the actual dimensions of the OP’s factory wheel tubs he might need that extra little bit of clearance.
A GREE W/ THE ABOVE INFO^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
LOWER THE AIR PRESSURE FOR NARROWER RIM.
I run the offset hangars on my 68 fastback, no problems. I run 275 60 15`s on 8" wheels, or 295 60 15`s on 8" wheels. I have massaged the whole set up. I have stretched front wheel wells that have the stock curvature, offset on the wheels had to be perfect. The 8''wheels are a little narrow for 295`s but work ok w/ lower air pressure on the street. No dragstrip so far.
U know those wheels in the pics are heavy enough to hurt ur performance a hair don`t u ?