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new engine and transmission

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I am eventually going to try 26 inch rims on my 2001 deville. I know it needs an engine with more power as well as a transmission, how do you know what fits without giving any problems? I really don't know much about performance engines and te biggest I want to go is a 350 with a trani that can handle it. Where do I start?

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This will be a huge project. I do not think there are any plug and play replacements. I think you should look first at the 5.3L front wheel drive such as the 2006-2008 5.3L for Impala SS, Monte Carlo SS, and Grand Prix GXP


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