I recently converted a 4-cylinder 87 LX to a 5.0. I used a motor and harness from a 1989 GT and everything plugged in. Now my fuel pump is staying on and my gauges don’t seem to be working! What is going on here? — J. Owens, Valhalla, N.Y.
Even though your connectors all plugged in, there are variations in the harnesses between the years. You can fry your computer and/or harness if you don’t check the differences with a proper schematic diagram. Note: Some harnesses do interact properly, but each swap should be handled on an individual bases. — Mike
How can I tell if I have a Mexican block? — W. Ford, Lake Success, N.Y.
Mexican blocks have the ID “HECHO EN MEXICO” cast stamped in the lifter valley. These blocks are known to have a higher nickel content as well as having thicker main bearing caps. The new Ford Racing Sportsman block has similar caps, although these blocks do have thicker web supports at the main bearing saddles. — Mike