Also from that cd image there was enough of 4.1c to make a working system by untarring it from within 4.2 BSD ...

VAX780 simulator V3.8-1
Listening on port 23 (socket 156)
loading ra(0,0)boot
Boot
: ra(0,0)vmunix
215688+63964+69764 start 0xf98
4.1c BSD UNIX #2: Tue Aug 28 09:39:12 PDT 1984
real mem  = 8384512
avail mem = 7036928
using 148 buffers containing 838656 bytes of memory
mcr0 at tr1
mcr1 at tr2
uba0 at tr3
hk0 at uba0 csr 177440 vec 210, ipl 15
rk0 at hk0 slave 0
rk1 at hk0 slave 1
uda0 at uba0 csr 172150 vec 774, ipl 15
ra0 at uda0 slave 0
ra1 at uda0 slave 1
zs0 at uba0 csr 172520 vec 224, ipl 15
ts0 at zs0 slave 0
dz0 at uba0 csr 160100 vec 300, ipl 15
mba0 at tr8
root on ra0
WARNING: should run interleaved swap with >= 2Mb
Automatic reboot in progress...
Tue Aug 28 09:54:53 PDT 1984
/dev/rra0a: 836 files, 6010 used, 1419 free (35 frags, 173 blocks)
/dev/rra0h: 6598 files, 41780 used, 320080 free (160 frags, 79980 blocks)
Tue Aug 28 09:54:58 PDT 1984
local daemons: telnetd ftpd tftpd syslog sendmail.
preserving editor files
clearing /tmp
standard daemons: update cron accounting berknet mail printer.
starting network: rshd rexecd rlogind rwhod routed.
Tue Aug 28 09:55:00 PDT 1984

ucbmonet login: root
Last login: Tue Aug 28 09:44:44 on tty00
4.1c BSD UNIX #2: Tue Aug 28 09:39:12 PDT 1984
Master source now lives here; freeze your 4.1c stuff now.
monet#


For those who are curious.... 
http://vpsland.superglobalmegacorp.com/install/simh/4.1c%20BSD.7z