Guys...I know I'm beating a dead horse here but I have to revisit this topic. My 4 banger 93 YJ is driving me crazy when going up any type of hill. The power is not there and it frustrates me to be following behind a cargo truck in the slow lane with all the fumes. I'm at the point to where I'm about to do the ultimate...yes...get a straight 6. Which 6 banger would you guys recommend? I have two buddies that have had jeeps all their lives and they are willing to assist me with the swap. Or would it be better to let a professional mechanic handle the job? Are you any mechanics here in Northern Cali on this site? I'm in the San Francisco Bay Area. I've also read that you can do a few changes to the 4 banger to compensate for its lack of power. Please...your opinions.