those 3 relay things are called the Relay Box. This is a box that is meant for people who want to megasquirt but their cars never came with EFI or relays. Its pretty much to convert old cars to new. Why he got that I do not know, he really only needed to tap into 1 relay source and thats the fuel pump relay.
As for that box thing where the vacuum goes, thats his coilpack. Its a FORD EDIS-4 4 tower 2 coil bound coilpack.
Heres mine attached in the cockpit.
If you have any questions regarding MS and EDIS go to my walktrough/write up heres the link.
zerothread/164446