[s][/s] Standard port will be fine for that cubic inch and horse power range. I am making alot more than that with Standard port Heads still with a 10.5:1 pump gas street engine. However, mine is 528".  I have the old style Mopar Performance aluminum heads (std port location) on my 11:1 pump gas 572" hemi. Basically aluminum versions of the stock iron heads. Had MCH cnc port them and makes somewhere in the 850 hp ballpark naturally aspirated.
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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