i have a set of new BB Victor heads in the shop and thought i would pass on a little info...

the first thing is, while the catalog states these heads come with semi-finished guides and no valve job, this set i have has the guides already properly sized, and the seats cut the same as what you'd get with a set of RPM heads.
they had seals on them, and the guides lubed already.
for the most part....they "could" have been assembled and run as they were.

i touched up the valve seats, checked the guide sizing, back cut the valves, and did a little tweek on the ports to see how they would respond to the most basic of prep work.

here's how it turned out:
tested on a 4.375 bore

OOTB:
lift----I/E
.100--64.9/55.5
.200-136.4/112.1
.300-207.3/155.4
.400-254.7/192.3
.450-267.5/205.4
.500-288.4/215.8
.550-299.1/222.4
.600-308.1/225.0
.650-317.0/226.3
.700-326.0/226.3

valve job, back cut, and minor chamber relief cut(no porting):
lift----I/E
.100--72.6/69.2
.200-142.8/121.0
.300-209.7/163.3
.400-257.9/197.5
.450-277.2/210.6
.500-293.7/218.4
.550-302.7/222.4
.600-311.7/225.0
.650-320.6/226.3
.700-327.8/226.3

basic clean up of entire exhaust port, blend relief cut into chamber, blend CNC'd intake port opening into runner, blend intake bowl to seat, sand roll intake short turn.

lift----I/E
.100--73.1/63.8
.200-144.6/123.2
.300-210.9/165.3
.400-259.5/202.7
.450-280.4/217.1
.500-299.1/228.9
.550-309.9/236.8
.600-320.6/242.4
.650-327.8/247.8
.700-334.9/251.8

the heads come with spring pockets at around 1.740 diameter, so a spring cup will be needed to locate the spring.
with a spring cup, a race type Ti retainer and std height locks, the installed height comes in around 1.900....so unless there is ample thickness available to lower the spring pad, the spring choices will be somewhat limited.

the guide clearances as they were OOTB on this set of heads was right at .0015 exhaust/.0012 intake.

unlike an EZ or SR head, these are really more of a true std port size head, where as the EZ/SR heads have the roof raised beyond the port opening so turning them into a MW size port is relatively painless.
on these heads, you'll have to take quite a bit of material out of the roof to make them a true MW sized runner(it looks like it will be similar to what you have to do to a B1-BS intake port to make it into a MW sized head).

other than the 260cc CNC Chapman stage 6's, this is the best flowing OOTB std port opening head that ive tested.