rear shock problem

this weekend got an 83/4 under my car its a 74 dodge dart sport. went with caltracs their mono leafs , moved the springs in and moved the rear back 3/4 so the tires are more centered. also welded a brace on the rear and thats where the problem comes in the shock wont bolt up. just wondering if any of you have ran into this problem or have mounted the shocks a little different.