if your cruise control doesn't work and you don't plan on fixing it then get a vacuum tank out of a cherokee without cruise, they are round and smaller and easy to relocate. on older cherokees the ones with the np242 transfer case didn't have the vacuum disco. axle and the ones with the np231 did. this has been my finding after crawling around a bunch of them at the junkyard and the ones that i have worked on, but i use this as a guideline i don't know for sure if all of them were like that.