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is the oil pan designed to fit an LS motor in a 55-57 chevy approved for heavy race applications? Otherwise I would have to notch the frame.
 

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I'm confused. Approved by whom?
 

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Here's some pictures of the pan from Mast Motorsports. The only negative that I have with it is that it doesn't have the rear bolt holes for the transmission. I don't know how important that really is, but GM seems to make a big deal about the "LS" oil pan being a structural part of the engine. I was going to buy it before I got my Holley pan around the end of 2012, but it was back ordered at all the Mast distributors. I called about 20 of them at the time and no one stocked it. They all just drop ship when you order one.

 
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