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Re: What are these and what for?
I assumed it was related to casting and not operation, but I honestly don't know. I broke a breaker bar trying to get one out once, so they don't yield easily...
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1970 GMC Sierra Grande Custom Camper - Built, not Bought
1969 Pontiac 2+2 427/390 4-speed Coupe
1969 Pontiac 2+2 427/390 4-speed Convertible
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