Have a 72 frame/body (with oil tank behind passenger door) and a 74 2.7 case. Previous owner did all work (and now I am at the end of a complete rebuild). Need to see if this is right - I don't think so but thought others would have more expertise. If you look at the picture with the thermostat - the back line comes from filter on the left, in to therm, then out to front oil cooler - that seems fine to me. The return from the oil cooler comes back, loops around and then comes in the the thermostat from the left and then in to the tank. Maybe it is the Mocal therm and it operates different but intuition tells me it should come back to the therm from the right side of the therm and then the line leaving therm to left should loop to the tank. The diagram picture shows what is on the top and what seems right to me on the bottom. Does the Mocal therm work the same as all others - ---> on the "top" and <---- on the bottom?