Is this an LS1 or an LS2? HELP!
The seller says it's from a 2004 LS1/T56 GTO.
The pic's that he sent me have a caption on them that says it's an LS2.
Is there anyway to tell if this engine is an LS1 or an LS2 from these pic's?

Good eyes on the casting number. I missed that. Looks like I'll be picking this one up then. It only has 5,000 miles on it and I thought the price was a little high for an LS1 but good for an LS2.
In order to run a throttle cable can I just swap the TB to an LS1? Will the PCM like that?
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Thanks for the help and answers guys.
The motor ships out tomorrow
Will the LS2 PCM have any issues with running an LS6 intake and throttle body? Can it be retuned to work?
Last edited by supernova1972; Aug 16, 2007 at 01:02 PM.
The SR20 put out 312rwhp and it ran 12.74 @ 114 on street tires with a 2.1 60ft.
I'm hoping to run in the high 11's with the LS motor and some better tires. We'll see.






