Engine help
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So I about to buy a nnbs 5.3 engine to put in my 07 silverado that currently has a 4.8l. Is there any motor I would be better off getting I want to go with the 5.3 instead of a 6.0 , and if I swap it and change the dod if it has it I not sure on which motors do? Would I be able to run the motor with my current 4.8 tune for a while until I can get it retuned thanks for all the help in advance guys
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