what size is balancer bolt?

[falcon fanatic]

I need to source a longer balancer bolt to accomodate a crank trigger wheel. Wondering if anybody knows the size of the stock one.

This is for a '69 block 200.

 

[rae61]

I just measured a spare I have it is 9/16 - 18 TPI, I would use a Grade 8. Hope this helps.

 

[falcon fanatic]

Thanks! that's what I was thinking, but it could also have been 5/8-18 so I wasn't sure.