There are what appear to be 2 bolt holes next to each other under the coil and next to the choke control. But i only pulled one bolt from the area... GUYS ITS A NON SMOG HEAD ON A 1974 SMOG MOTOR. Just want to make sure people see this fact. stock manifold and everything. I figured the only difference in the heads was the exhuast holes for smog (which were plugged on my old head intentionally).... but still doesnt explain the coolant. I spent a week doing this job little by little because of back issues. Now i deal with this.