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Discussion Starter #1
any one have this issue with the big chief heads oil return holes not lining up with there dart big m block. if so what did you do to fix the issue. I have maybe a 1/4 of the hole lining up. Thank You
 

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Installing drain back lines will help. #8 size from ends of heads to side of oil pan inline with main caps. And yes, grind away.
 

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that's why you need to mock up all the parts before assembly to check for that stuff,a die grinder works
 

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Discussion Starter #7
I have the same issue with drawback holes on my 12* Profilers....So I have -8 drainback lines on both heads straight to the oil pan
So did you just add the lines or did you also grind to get original holes to match up etc.
 

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So did you just add the lines or did you also grind to get original holes to match up etc.
I cleaned up the casting flash, but that was it. They are also partially blocked by the head gaskets too.
 
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