Oh great Powerstroke gurus, I am in need of some serious advice. I want to change my truck to a Crew Cab model with auto transmission. I have been debating for months now whether to go with a more recent (and more expensive) 6.4, or with a 6.0 or just try to find a decent 7.3. Now I pretty well have a hanvdle on all the plusses and minuses of all the engines. Ultimately, I am looking for a solid 500 hp engine that will give me good mileage and years of problem free driving. I almost do no towing. My truck does not work hard. The seemingly obvious choice would be to go with a 6.4 because they are relatively easy and cheap to upgrade, it's just that all the electronics on these engine kind of scare me. The 6.0 seems ok, after youve done the reliability modifications such as the EGR delete, the headstuds and head gasket etc. I just keep hearing of too many people with issues that seem to pop out of nowhere with these engines. And then there is the 7.3, the good old reliable 7.3. Mine has 300,000 km on it, never had any issues whatsoever with the engine, transmission, clutch (still the original one), and diff. At this pont, I'm thinking buying an engine and rebuilding it with forged rods so I can get to 500 hp and dropping it in to a crewcab. I guess that factors such as money, time and sweat must weigh in the equation. But there is just some kind of satisfaction in owning a 7.3 and working on it to make it better. Just a little confused at this point.