How do you change the starter on a 1998 Cadillac Eldorado with a 46 Northstar engine?

It is located in the valley between the cylinders. You can loosen the throtle body, all the bolts holding the intake manifold and then lift the manifols just enough without disturbing the fuel rail to gain access from the lest side of the car to the right. This can be done with common tools and the gaskets on the manifold and TB can be reused if not damaged.