Spring Relocation Question

As you can see, I've built the front spring boxes but have not drilled the holes. If I move the holes back 1" in the front spring hangers and install the spring tubes at the rear in the existing hole in the frame, will this cause the shackle to bottom out on the frame? If I drill holes at the rear that match up with the existing rear pearch holes, I don't think there is sufficient clearence for the shackles to clear the rear supports. I could have new springs built that are approximately 2" shorter than stock and solve all problems. That's not going to be cheap!!! th_P1010531.jpg

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