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I'm not sure if I have the correct timing tab or timing cover on my 78. The timing mark on the 8" balancer is directly at the top (12 'o' clock position) when I'm at TDC but it's no where near my bolted on tab. When I do a piston stop check the 1st stop is right on the edge of the tab about 15 deg BTDC & the 2nd stop is about 2 1/2" further away BTDC. So both marks are to the left of the tab. I thought they changed a few years before this model. Thanks
 
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