Is the MX83 a digital dash? Because you can build one tacho out of two to drive the ma70 tacho with a jza-70 back plate and electronics if it is an analog/dial type. You gotta love the 1j! Mine just passed RTA inspection and is completely legal....wheel spin in wet at 100k's uphill, 110 km's in 2nd, 150 km's in third ....thrashing 5Lt V8's, 180SX's etc - all whilst still at 8 psi. There is just something magic about these engines!