 good luck
i would not recommend using a SHO engine and trans in a normal taurus because you will need to swap the subframe and all along with the computer harness and computer which is inside the dash, the SHO engine would be a huge upgrade since these engines stock can beat stock mtx mustangs, also in case you didnt know yahama made these engines for ford. best bet with a normal taurus is just go stock engine on them. i got a 3.8 off a 93 sitting around that would match up nicly they are rated 140 hp and 200 ft lbs of tq. many normal taurus are sitting around in junkyards so im sure you could find one | 
