alright sooooo... Im trying to get a motor today from a junk yard... now I dont know if most junk yards will know if its a B18B or a B18A because most of the motors arent in front of them... BUT!!! ive only found B18A's so far... if im planning on Rebuilding it with all new internals. does it matter? id like a B18B cause i wana swap into a 95 civic... for easy-er installation. is it just the head in difference?