Those are DPO made holes, prolly a rifle rack .
It looks like you got the harmonic balancer done already, in general you install the cover loosely, then the balancer and after it's torqued you go back and tighten all the timing cover bolts, this avoids the need for any special centering tool .
I hope that timing chest cover isn't Chinese....
It looks like you got the harmonic balancer done already, in general you install the cover loosely, then the balancer and after it's torqued you go back and tighten all the timing cover bolts, this avoids the need for any special centering tool .
I hope that timing chest cover isn't Chinese....
.