Here is another pic of a nicely done full HOME ported 4416 head.
again see the strong flow paths around eh valve guide boss.
These heads will make strong power on a street motor
with a strong torqy power band well past 6000rpm.
With other good supporting parts. Like a 750-800cfm carb performer rpm or vic JR
healthy hyd or street strip solid lifter cam long tube 1-5/8" headers and 2.5" ex.