Drill the two holes would be the easiest since your engine is hanging on the stand .Check in the tech tips up top look under the engine category there will be a tech tip. Also good point by Jerry about the harmonic balancer belt size and also you may want to read the tips for harmonic balancer bolt and the tip about changing the bolts that are under the oil pan ,so you don’t have to drop the pan if you ever need to change the timing cover gasket.
