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gen lll or gen lV block?

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Old 12-06-2013, 10:02 PM
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Default gen lll or gen lV block?

Hey guys new to ls builds. About to start my first ls build, ironically enough its going in the first foxbody I ever owned. The fox that started my obsession with foxbodys. Anways to cut to the chase. I got a deal on 2 really good blocks. One is a 2002 5.3 and the other is a gen lV. My question is which one is the better one to go with. Is deleting the dod expensive? Also what other differences between the should I know? They are bare blocks. I plan on stock crank forges rods pistons and it'll be turbo. Thanks
Old 12-06-2013, 10:37 PM
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Also I don't have a harness. Whats the best one to get. Should I go aftermarket or get one from a junkyard? If from junkyard is there a particular one I should look for 'I.e' camaro, truck, suv, etc
Old 12-07-2013, 04:53 PM
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Get whatever block is in better condition, use a stock gm harness.
Old 12-07-2013, 10:32 PM
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the 5.3 block is good for a ls383 ,the gen4 block allows for more bore .get a wiring harness for the car your block cam from .
Old 12-08-2013, 09:35 AM
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http://www.gmhightechperformance.com...ngine_history/
Old 12-11-2013, 07:28 PM
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the stock rods in 05+ are stronger. the fuel injectors and knock sensors are different. dod delete is about $300 I think. you might some issues with the electronic tb in the gen IV. gen three are cable but you could always change that. really whichever is in better condition.



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