Of course with the IFS steering box, there is no such thing as a stock measurement, as the '85 had a push-pull box in stock form. Looks like yours is moved up to hit the front body mount, so about as far as you can go w/o cutting that mount:
[Linked Image]

http://www.4crawler.com/4x4/CheapTricks/CrossoverSteering/index.shtml