Harmonic balancer bolt size

[JaysNMDustr]

I need to find the proper size bolt for my harmonic balancer slant 6 225 1970 Duster. Anyone know? Got the engine rebuilt and when I pulled the engine out discovered the bolt was missing can't find a kit to buy online. Got a replacement balancer from damper doctor, best price I could find.

 

[70Duster440]

I can tell you a big block is 3/4"-16 pitch thread, 1.25" long. I'd bet they are the same across all engines but one of the S6 guys can confirm or deny this.

 

[cjh]

Originally, they didn't have a bolt.

 

[38 Dodge]

I might have a spare bolt or two laying around here if you want one just let me know?

 

[gregpurcell]

You don't use the bolt as mentioned above. That's why you don't have one. If you put one in it may even hit the fan or the pulley. strange but true!