ok heres what i got a stock 12a with a holley 4 barrel 650 setup..

i know the yellow mark on the centric shaft is TDC. but when i baught the motor the motor had the dizzy out. how do i know when the dizzy is at TDC when it?

also what is the arrow for on the rotor buttton for... please help me with this cause its winning right now. thanks.

 

the dizzy has a mark. and the gear has a mark. match them up and put the pulley on mark . drop it in and done