I don't think any of the mentioned intakes will have a problem making 725+ hp on a 528-540" engine...considering everything else is up to par.
If I was going for a low profile intake for dual carbs...I'd use the Stage V.
I prefer a big single Dominator setup.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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