Engine block casting number help
06-22-2011, 07:36 PM
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Engine block casting number help I have what appears to be an ls1 engine but I can't find these numbers on line. I need some help. I saw the motor get pulled out of a 99 trans am. The casting number is 12567393 think if might be a 5.3? The intake looks right and so do heads but block doesnt look aluminum.. if it is the 5.3 can I hop it up with ls1 cam and other aftermarket parts? Any help would be great its going in a 97 camaro
06-23-2011, 02:01 AM
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throw a decent cam in it, and port the heads. have a 5.3 in mine and it makes good power. Not ls1 power but hey I bought it thinking it was a ls1 so been driving it around and beating ls1's before i did the cam swap so who knows what we will see at the track now.
