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Message: [QUOTE="DocBar, post: 489845, member: 433"] Not dissing your mechanic skills, but I'd go with Swamps competition long block or have someone like David Lott build your motor. It's expensive, but those guys know the secrets of building high HP motors that live. The mantra "if ya can't afford to build it right once, you damn sure can't afford to build it twice" is never truer than when dealing with the 7.3L. Keeping a motor alive over 500HP is expensive and you'll likely never reach the level of what newer diesel motors can do. You might seriously consider getting a 6.4L. They can reach higher HP #'s a lot easier than the 7.3 plus you get all the bells and whistles that come with a newer truck. I love my 7.3 and will never sell it, but I'll probably never buy another one that gets over 400 rwhp. The HEUI is just too limited and expensive. If you do go ahead and build a big HP motor, research your tuner very carefully. That will be a huge factor in living or dying. Think long and hard on having your tuner of choice keep all of your tunes at less than "all out". Having a strong ~500rwhp truck for years is much better than a ~600rwhp truck for months. Or weeks, Or days. My 2 cents. [/QUOTE]

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