offset shackles (how big a tire)

hey just wondering if anybody has put a set of offset shackles on a dart.i have a 67 planning on using a set. just wondering how wide a tire and rim combo you can use with these shackles i think they offset about .8 of an inch any help would be appriciated

I offset mine with the offset shackles and hangers. I just won't to make sure you get the hangers also. I have a 15x8 wheel with 275/60/15 tire. Now after all said and done I "think" I could have went with a 10x15 and a little bit wider tire. There is no way I could have went with a larger in diameter tire but could have went wider.

The picture shows how much I have between the tire and leaf spring in which I had only a 3/4" before. So it helps alot to offset them.

Cuda boot area 069.jpg