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Message: <blockquote data-quote="99Sierra2500" data-source="post: 25603" data-attributes="member: 12343"><p>I used to have a '72 C20 with a big block, put flows on it, a long time ago. Fun stuff, I suppose it was around a similar age to what the GMT800's are now. I have had newer trucks, and though I just like these ones, mostly have good power, and can do 70 on the freeway w/o having to be 3000+ rpm. Old days didn't matter as much as the speed limit was 55.</p></blockquote><p></p>