I agree that it's not a good idea to put anything in a bind by forcing it to fit. But using the 3/4" offset shackles, it would move the rear of the spring about 3/4" inward and the middle of the spring roughly 3/8" inward with the front remaining in the stock location. There is usually enough "slop" in the fitment to line up the spring locating bolts with the B-body spring pads without a bind. The pads were already cut off of my housing so I couldn't confirm the OEM B-body pad location fitment. But I believe it's a sound theory. The shackles did not put the front spring eyes in a bind with the very slight angle change on my car.
As for spring usage, there was a Mopar front spring mount kit that allowed the shorter leaf springs to work in an F-body. But ideally, it would be best to have proper length leaf springs. I got a set of used, custom made SS springs for my wagon but did use the 3/4" offset rear shackles.
I think I got it!
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