ID small block timing chain gears

[Rapid Robert]

To ID what I have. how many teeth does a SB or BB timing chain gears have? thank you for your time. RR

 

[Oldmanmopar]

Small blocks have a Keyway big blocks have a pin or three bolt

 

[Rapid Robert]

that'll work, thank you

 

[413]

The center of the gear is different SB and BB.
show a picture. 3 bolts have a pin also.