its important to point out that there was no short turn work done on this intake port. it was still as cast.

while its true that the old MP engine manuals warn against reshaping the short turns at all, the fact is....on the 906/915 heads....the intake short turn rules the port.
no short turn work......no big flow.

here is how this set of ports flowed as they are in the above pics:

lift----I/E
.100--73.1/55.9
.200-133.7/112.3
.300-196.4/151.5
.400-237.1/163.5
.450-241.9/167.4
.500-240.3/168.7
.550-243.5/168.7
.600-241.9/167.4
.650-233.9/167.4
.700-230.7/166.1