I have an '87 YJ with an '89 4.2l, 3speed automatic. My interest in in doing away with the 3 speed in favor of a 4 speed. How much pain in the ass would it be to swap in the 4 speed from an XJ with a 4.0. Would it be a direct bolt in? I ask because the pick 'n pull I deal with NEVER has YJs in stock. In the past year they have had 2 and people decended on them like vultures. They get more or less stripped within 2 days. Yet, they have more XJs than you can shake a stick at.