From a 2012 Procomp catalog listed as 285 cc CNC intakes, 2.20 & 1.81 valves, and 72 cc chambers:

.100 - 69.3 / 57.4
.200 - 147.5 / 116.8
.300 - 217.8 / 159.0
.400 - 278.3 / 211.8
.500 - 319.7 / 241.6
.600 - 343.9 / 269.0
.700 - 357.2 / 287.7
.800 - 364.5 / 299.8

No specs provided on bore size used or size of exhaust pipe extension, either.

Your hand-port work on the intakes of my Procomp casting resulted in #s pretty close to those claimed #s above.