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Message: <blockquote data-quote="stutaeng" data-source="post: 25828" data-attributes="member: 6175">Huh?How did you figure the 4.8 lived harder lives? [Monkey thinking emoji] There's simply less 4.8s because they were only offered on the 1500 pickups (along with the 4.3 and 5.3) and Tahoes (along the 5.3). The Suburbans didn't come with the 4.8. Although the 4.8 were used on the 2500 Express Vans (along with the 6.0). So fewer models offered with the 4.8 = fewer production numbers.In my observations and experience, the pickups tend to be used for work trucks more often vs the SUVs, so those engines usually get more abuse and neglect than the SUV/soccer Mom/family haulers. Express Vans are probably the MOST abused and neglected because they are almost always used as work vans. Very few passenger vans out there in comparison.Those 4.8 5.3 6.0 blocks are not common at all anymore, unfortunately. They were only made for the first year or two. A 4.8/5.3 block bored out to 5.7 LS1 specs is doable though. Basically you can create an iron block LS1 with factory internals.But there's plenty of aftermarket companies making LS blocks these days......speaking of which, did you guys see this series of the LS vs Coyote? Those engines are insane![MEDIA=youtube]IBpNSFGmrxk[/MEDIA]</blockquote>