Originally Posted by fast68plymouth
Quote
Out of the box MP heads usually flow around 375cfm


Uuuuhhhh........... not even close.

I thought they were more in the 330 cfm range?

MCH cnc ported my MP heads back in 2006 and they flow right at 430 cfm.

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