ATI damper install question...

[wfot]

I have an ATI damper going onto a sonny bryant crank.


the washer is larger than the hole where it is supposed to be going into....


what gives with that?



anyone else using an ATI damper have any issues with this?


I would like to use GM parts whenever I can so I guess I have to machine the washer down to be able to fit inside the front of the ATI damper if I am not missing something obvious...


Anyone know the diameter/pitch of the crank bolt?


thanks



John