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Message: <blockquote data-quote="Hellion94" data-source="post: 396876" data-attributes="member: 8471"><p>It depends on what production 5.4 block you're referring to. There are a couple of different blocks - The GT block, which will probably handle close to 2,000 hp, the Lightning block, which I think will handle a pretty good amount of power with some good internals, maybe 800 -1,000 or more (I'm not real sure, correct me if I'm wrong) and I'm not totally sure that the Navigator/F-150 blocks are much different than the Lightning ones, but again, I'm not 100% sure. I do know that there have been 1,200-1,400 hp cars that had navigator blocks though, so who knows.</p></blockquote><p></p>