Timing Chain Cover crankshaft opening is the wrong size

I have Power steering, and power breaks with factory front disk breaks. Timing is a bit challenging its like threading a needle but I never thought anything of it I just thought it was an odd Mopar setup.

I appreciate the feedback I now know the mixed configuration half 68 half 73.
I'll be replacing the 68 2 barrel carb with a 73 4 barrel intake at the same time as this other stuff
best to do it while Ive pulled the front side of the motrr off.