Ported Edelbrock versus W2 out of the box !

From Ryan’s website; Shady Dell Speed Shop


LIFT--------AS-CAST---------PORTED
.100”------62.1/44.9------------82.8/55.2
.200”------124.9/101.8---------148.4/107.6
.300”------179.4/138.0---------205.3/160.4
.400”------220.8/151.1---------255.3/193.2
.450”------238.7/155.2---------273.3/203.6
.500”------252.2/155.2---------291.5/208.7
.550”------258.4/155.2---------303.9/213.9
.600”------260.5/155.2---------313.3/215.0
.650”------253.6/155.2---------324.3/215.7
.700”------253.6/155.2---------320.8/217.0

260 cfm is enough to get you going good with enough camshaft (& associated parts) in a light car.

65 CC MP W2 "AB" 15 DEGREE CIRCLE TRACK HEAD, VALVE JOB ONLY, NO PORT WORK

LIFT--INTAKE FLOW
.100"---72.3
.200"--131.1
.300"--187.0
.400"--226.3
.450"--238.7
.500"--253.3
.550"--263.9
.600"--267.4
.650"--269.1
.700"--269.1

The cost of the head is comparable to well done Edelbrock heads with a spring change for the cam intended that can’t use the Stock Edelbrock springs.
The roller rocker arms & gear are twice the price. Ouch.

All in all, worth it i think.