Honestly, if you need another 1.5 or 2 inches of reach, I'm not sure you'll be able to get this to work w/o some clown bike kludge. Just eyeballing without measurements, it looks like your stem is already maxed out at 120 or 130mm and sits up about as high as a Technomic. You could probably get handlebars with more reach and a seatpost with more setback but I would start with careful measurement of a bike that fits and see if you can achieve that same fit on the Fuso before you spend money. It's not the end of the world to move a frame along.