2/14/2023 0 Comments Chevy small block decoder![]() That is why I don't even bother with casting numbers. All he was doing was "writing it down" for us to read later. The person who stamped the numbers onto that engine ID pad had all of the information already. However that pad up front is totally unique. This is why there is such diversity in what the casting numbers tell you it could be (that combined with the fact that about once a decade or so GM reused old casting numbers on another block all together). But until it it is machined and assembled it could be any engine made from the same bore size. Whether it’s the second or third generation, you can find the number on the passenger side of the engine block. Meanwhile, the 230 and 250 are part of the third-generation engine, most famously found in the first-generation Camaro. So any one of them could be your motor that were all made in that day. As well as other cars such as Chevy 150, Chevy 210, and the Bel Air. The foundry casts thousands of engines (well blocks one day and heads the next, etc.). Take a wire brush and brake cleaner to that pad and you will be able to see the numbers after a little light sanding to remove the paint.Ĭasting numbers are generic. It is covered in grime and has a thick coat of orange paint on it that doesn't belong there but the information you are looking for is there. That is the spot to look (on the passenger side of the block under where the alternator would sit). ![]()
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