Goes deeper then just car vs. truck. The Blue Flame was the first engine installed in the Corvettes, until they started using V8's. The Blue flame had three 1bbl side-draft carbs, and maby a different head that gave it some more umphhh making it the classic little roadster every one feel in love with.
Here is alittle info from Wiki.
Chevy 235 L6 on Wiki
