OPS should be at the back of the engine where the distributor goes into the block aprox 1 inch rear and to the right, or down by the oil filter or both.
No you don't have to run the smog pump, unless you need to pass an emission test??? You may have to turn the pump off in the program, or you may get a check engine light.
Does your intake manifold have the spot for the 9th injector also known as the cold start injector? If it does you can plug that hole.