go t5, the mt75 means having prop made as well as a gearbox made from a 4x4 box, t5 is easiest these days, bellhousings are about £30 plus shipping from the states, as the 2005 mustang v6 uses a t5 for the manual base model, and the v6 is the 4.0 explorer engine that is a 4.0 version of the for 2.8/9/24v cosworth engine, if your lucky you'll find a t5 and bellhousing, find an American car importer local to you and talk nicely, and if your lucky for a small fee, he'll bring it all in, in the boot of one of his imports, thats what i did, i use a guy in chelmsford.