Well, I've finally had a chance to get back to these heads.

I knew putting a proper valve job on these heads would perk up the flow, but this might be the biggest gain I've ever seen from recutting some seats and a little blending.

With the ootb numbers being what I would only consider so-so, I didn't really feel like you were getting your money's worth out of the cnc job.
After cutting the seats and blending, I think it's clear....... It's going to be the most cost effective way to use these heads if you were looking for 340cfm+ flow values.

The valves going in these heads are Manley 2.19 intake and Ferrea 1.81 exhaust, and both had a small back cut for this test.

All that's done between this test and the first is recutting the seats, and then blending the valve job into the bowl and short turn...... And the new valves.
Same head/same cyl as the first test.......
28", 4.375 bore, no tube on ex-

Lift------I/E
.100---73.9/59.1
.200--153.6/120.7
.300--218.4/172.0
.400--270.0/206.4
.500--314.1/229.6
.550--328.0/245.7
.600--340.3/251.3
.650--348.5/255.1
.700--359.0/258.9
.750--351.6/262.7

Both ports are much smoother and quieter sounding after the rework.

It's better than I expected them to turn out.

Here are the ootb numbers again so you don't have to scroll back and forth:

Lift------in/ex
.100---70.4/56.5
.200--146.8/107.3
.300--211.6/152.5
.400--258.7/184.2
.500--288.7/203.0
.550--303.6/210.5
.600--314.1/215.4
.650--325.3/219.2
.700--331.7/221.8
.750--331.7/224.9