Timing Chain-moving the Crank

with the #1/#6 pistons at TDC the crank keyway will be at ~1:30 & the marks closer to the center of the cam gear (lower) are for picking the correct keyway slot on sets that have advance/retard & straight up (3 keyways) & the dot up closer to the tooth root are for getting it dot to dot (6/12 o'clock). yes the various mfrs combos of dots/triangles/squares/rectangles etc can be confusing plus some ain't stamped evenly so they can be even more in disarray. If the "dot" for 6/12 "dot to dot" is in the same relationship to the tooth that is above it (under it/near under it/halfway or partly inbetween teeth) as the old one & the dot is the same distance around an imaginary arc from the crank keyway as the old one then you are golden.