I've started installing the bus transceivers for the clock/control module. There will be six other boards to control, so I'm putting in six 10-pin shrouded sockets. Each socket will provide two 5V lines, 2 GND lines, CLK, !CLK, RST, and !RST. Each of the non-power signals will be driven by one channel of a 74HCT245 transceiver chip. These transceivers are designed to drive up to 15 TTL chips per channel.
As you can see from the backside of the board, I'm not quite finished with the wiring yet. I've only wired up the "head" transceiver, which itself will drive the three "sub" transceivers.