You don't need to lift your jeep at all for the 350 swap. But if you want more details, contact NOVAK Jeep Conversions. If you go to their website, they have a "knowledge base" which is more detailed than any I have ever seen for any product. I am sure it will answer all of your questions.
A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models!