spring relocation inboard help

Thank you! I read that a long time ago and just read it again. Doesnt look to bad but i am worried about getting it back in there square as im not too great with math and such. I cant weld but i do have a good friend that is a mechanic for a living and can weld very well. Let me ask this though, could i still fit a 275/60/15 back there with ONLY doing the 3/4" offset shackle install?