timing flat head

Yes. Use a socket that will hang over into the cylinder and will hit the piston. Have not tried this using a flat top piston. I have domed pistons.
 
Yes. Use a socket that will hang over into the cylinder and will hit the piston. Have not tried this using a flat top piston. I have domed pistons.

NOT that this method won't work if you're REALLY, really careful but with the stop being that close to top of piston travel, I think it would be easy to mis-mark the actual stopping point on pulley, because as the piston is near it's upper-most travel in the cylinder, there's a situation where a FEW degrees of crank movement can translate to negligable upward movement of piston. That's why I suggested positive stop at least 3/4" down from top of piston movement. Just FWIW for accuracy. DD
 
Yes, Bill is right. There is no need for the center bolt. Just a flat bar which will stop the domed piston.
 
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