GAH!
I think we have had this discussion once or twice . . .
$20 500 - $24 000 V6 - 280 hp 3.6L DI
$28 500 - $32 000 Z28 -385 hp retuned L76
$39 000 - $42 000 SS - 540 hp SC 6.2L
those are starting - loaded prices, not ranges for starting. Oh, coupes only
This gives a roughly equal increase in power, percentage wise. Its enough to beat all the competitors of roughly equal cost