Beta testing, still working a couple thousand miles later... Car's been off the road for a month now while I'm fixing various things related to age, mounts, brakes, etc...
I took a big leap of faith and totally removed the EGR tube and I'll be plugging the open ends with metal disks. I'll probably eventually open up the EGR valve and remove the restriction. I've gotten good at removing the intake manifold now - only like 5 min. especially with an air ratchet...
Here's a shot of the relay ready for installation:
And one of the relay nestled in the box:
