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The LS1 6.0 motor is a truck motor and it uses a cast iron block. They are a popular starting point for big bore stroker motors as tey can take a reasonable over bore.
The LS2 uses much the same dimensions as the 6.0 truck motor but has the much lighter alloy block.
Just something to consider on the LS2. It uses a fly by wire throttle body like the Corvette. It also has a different generation of ECU which hasn't been cracked yet. there currently isn't any aftermarket tuning software for these motors. This probably isn't too much of an issue since by the time you come to fire it up there will be something available.
I reckon it wouldn't be to hard to adapt an LS1 ECU and wiring loom to an LS2 and convert the throttle body to cable operation.
Cheers
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Mike Murphy
Melbourne Australia
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