Well I think I fawked up. don't ask why but on the end of the crankshaft where the flywheel bolts. it has 2 spots just out side of the pilot bushing where 2 holes about 1/2" deep and 1/2" diameter were drilled. is this going to fawk up the balance of my crankshaft? if so can i somehow fill the holes to try and fix it? is there another option? or is this probably not going to affect anything?
thanks
bob

I don't think I would worry about it if it's that close to the center of the crank, if it makes you feel any better toss in some lead and fill the rest with JB weld to lessen the affect.

Find a shop there that can balance your assembly and get it balanced

I gotta know WHY are the holes there?:flipoff2:

If they are factory holes, they might be there for a number of reasons...

1. These may have been the original turning lugs when the crank was machined.

2. These may have been factory balance (material removal) to balance the crank.

3. If the holes are through, or threaded, these may have been the 'Hanger' holes used during heat treating or quality control inspections.
(crankshafts should never be laid flat especially after being freshly cast, heat treated, or machined. Always stood on end, or if possible, hung from one end or the other)

4. The material may have been removed for quality control sampling of the crankshaft material.
(This crank should have never seen the light of day in that case...)

5. If the engine was rebuilt, these may be the balancing holes or turning lug holes from that process.
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I'm not real clear, but if the poster drilled the holes, he's got problems...

And I ask myself, 'WHY?'
Why would you drill holes in a cast iron crankshaft...?...

I hope this isn't the case...
Holes drilled in cold cast iron are a great place for cracks to get started...