shock mount location & Wheel width question

[gono]

I'm running a TCI Must II IFS w/ air bags in a 55' 3100. I'm working out steering column issues and notice that during the travel from left to right that My wheels will contact the shock mount on the lower control arm. The tires are 205/65/15. I was planning to run a wider tire such as a 235-255. I believe I can clear the shock issue if I run a 20" wheel but that 's no the look I'm going for. Has anyone else run into this issue? and if so what did you do?