Welcome to toyota kevin. You will enjoy a lexus over a nissan anyday. Now to answer your questions. For the 98-05 lexus gs, they didnt come in a manual. Not in U.S anyways. I think Japan has them, but dont quote me on it. A 6 speed swap is a royal pain in the !Removed! on these. Require deep pockets as well. But hey if you have the money, then why not? I have seen one converted to a 6 speed, but the stock shifter was retarted long on it.lol. Im guessing you want to swap out the GE for the GTE? and if so, the auto swap is way cheaper. Best of luck to you with your lexus and welcome to the forum