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Gen III/IV Engine questions


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I have been to LS1.com and have perused LS1Tech.com, but am finding it a little daunting to find the exact differences in blocks and heads between the engines after the LT1.

 

I am particularly interested in any differences between aluminum and cast iron blocks.

 

If someone courld recommend a couple of good sites for me to learn more about these engines and blocks, I'd certainly appreciate it.

 

TIA

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The current issue of Hot Rod magazine has a really nice article on the specifics of the LS1 engine, and specifically the block itself. There are lots of pictures, and it talks about the differences between the early and later blocks as well.

The article is called:

Gen III Block Secrets

Everything you ever wanted to know (and a lot you never knew you wanted to know) about GM’s LS1-based engine blocks.

 

Hope this helps

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