360 head porting for big power (500HP ?)

on the bench for the final time


.........ex1.......ex2........ex3........ex4
.050--21.........21.........24..........24
.100--46.........45.........48..........48
.150--73.........70.........83..........80
.200--92.........87.........114........107
.250--117.......108........141........129
.300--137.......126........165........150
.350--156.......139........184........163
.400--169.......150........195........171
.450--178.......159........205........176
.500--182.......162........208........180
.550--184.......163........208........180
.600--184.......164........209........180

ex1-out of the box with OEM valve flowed with 1.75 pipe
ex2-out of the box with OEM valve flowed with out pipe
ex3-fully ported, REV semi tulip valve, valve job and deshrouding cut flowed w/pipe
ex4-fully ported, REV semi tulip valve, valve job and deshrouding cut flowed w/o pipe
I like what your doing I haven't had the urge to work that hard on factory iron in 20 yrs but I think you have way more head than needed for only 500hp. Good luck.