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You'll appreciate the following quote from Robert Heinlein -
"Always listen to experts. They'll tell you what can't be done, and why. Then do it anyway."
Robert A. Heinlein
Look at lindsey97's avatar pic for articulation of the stock rear suspension. The mod you suggest would remove much of this capability....
https://www.steelsoldiers.com/member.php?60120-lindsey97
Edit to add screenshot
Pull the tires in how? Changing axles? Chopping up axles?
Dualled 14.00s is bridge truck wheels or equivalent. You're not just a little bit over the 102" legal max. At that point you're way over. Someone measured, and going from memory it was something like 115".