Well you guys...the results are in, brought one of the heads to the same shop that did the flow test originally (same machine, etc)...actually had the same guy do the work (since I brought the original flow sheet write-up with me and he could tell it was his).

For completeness sake, here are the BEFORE & AFTER numbers for the INTAKE port only flow (no changes to exhaust):

LIFT - BEFORE - AFTER - %CHANGE

0.100 - 67 - 67 - 0
0.150 - 99 - 102 - 3
0.200 - 130 - 138 - 6
0.250 - 162 - 175 - 8
0.300 - 189 - 205 - 8
0.350 - 215 - 232 - 8
0.400 - 235 - 253 - 7
0.450 - 253 - 267 - 6
0.500 - 262 - 282 - 8
0.550 - 261 - 291 - 12
0.600 - 248 - 283 - 14

Sooo...while I love the bigger numbers, I need your feedback re: is this a reasonable improvement given the work I did? Or are the numbers too "optimistic"???

The flow bench guy said: "...I checked the numbers over, they seemed high for the size of the ports (bowl, lack of any significant short-side-radius work, etc) but they were consistent...seems like a good flow...".

To me they make sense...the low lift stuff matches pretty well and at higher lifts things really take off, I assume this is due to easier less obstructed port roof.

Here are a couple of shots I managed to take to capture the final shape: