I agree with wbrowne, I put the rear end in before I welded my IFS in, not only that but I had the rear 4-link setup installed before I did the IFS. I had a mock up set of wheels on the rear also. I used a TCI IFS and followed the instructions, and called them with some questions a few times. Must have measured a dozen times on both the rear and front setup before I welded!

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