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Did you swap timing chain covers? Did you know there were two different timing markers? One you check behind the water pump and the other is like is posted above at the 2 o-clock position.
Summit has a "piston stop" spark plug you can also get a degree kit (more acurate but can be done without it) and with these you can verify TDC.
What you do is make some sort of pointer for the ballancer. Put the piston stop in and turn the motor by hand till it hits that stop. Mark the ballancer at that point. Spinp the motor back wards till you hit that stop again. Mark it. Measure and finde the center of those two marks. Take out the piston stop and turn the moter till the pointer is at the center mark. That is TDC. Check the acuracy of your stock TDC mark. If it's over at the 2-oclock spot make an new mark at the 12 o-clock location or buy that bolt on timing tab in the picture above.
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Grim-Reaper
70 Pontiac LeMans Sport Convertible, worlds longest resto in progress
Looking for 71-72 2wd Blazer or Jimmy Project
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