I did the head many years ago, never seen a flow bench, did it by feel and look......port matched.
I had it on a slant that was 0.060" over, mild cam, headers, 2 & 1/2" exhaust, Mercury Turbo muffler, 2bbl intake, 350 Holley, regraphed (points) dizzy, Bosch GT40 coil, 14" open aircleaner, heavy duty clutch, BW 4sp close ratio box, 3.45 gears.....and would leave a 1973 XA Ford GT 351C Hardtop behind, and would run out at 120 mph.
Tried it on a drag strip, street tyres let down to 18 psi, and all I could get was a 16 sec 1/4 @ 89 mph.....was spinning into 3rd gear.....but on street asphalt, whole nother story.