hey buddy. i just put a 13b in my 1200. sit the engine as far back as you can. you will need to cut out the trans tunnel aswell. if you get some 8mm steel you can get it bent up the same shape as an rx4 crossmember. and thats your front brackett done. depending on what gearbox you use will differ to how big of a tunnel you will put in it. the main x member for the front end will need to be cut out and welded up. the further the engine sit back the more room you have for an exhaust. if you have any questions about the build pm me and im more then happy to help you out