Running thru a Boss EQ pedal adds a lot of "crap" to the signal path. A pure and minimal signal path is important for this glistening clean Garcia tone we seek. When you add a Boss GE7 pedal, you are adding at least 8 stages of crappy capacitors and crappy opamps as well as adding the noise from that many more crappy components. The GE7, or any EQ for that matter, should only be used for serious fixing or correction. It will never enhance or improve. It just clouds the lens many times over, just shits on the signal quality.
If you think about the real Garcia signal path sent to no-effects (OBEL bypassed), you have:
pickups - high quality film capacitors (2), and audiophile grade opamp (1), a pot, and then down the cord to the first vacuum tube in the Fender preamp. There's great beauty in that minimalism. It's like really good quality optics in a nice camera lens. You add a GE-7 or most any effect pedal, then you crap all over that signal path. You go from basically 3 really good devices in the path to triple that many crappy devices and components. And that's just with the one GE-7. It's like taking a sweet old Pentax prime 50mm camera lens and then adding a few layers of cheap hardware store plexiglass to the view. Maybe that's extreme, but when it comes down to really playing this kind of rig loud and with a band, that pure signal path is really key, it's part of the magic.
Now, when the effects loop is engaged, all bets are off. That's a crappier path, but it's for the effects, the Mutron, the phaser, the dirt, the delay, the octaver, etc. In that case it's ok because it's about the effect at that point. But that pure, clean, raw, minimal signal path when Jerry played clean, that's a purity worth preserving as much as possible or practical.
... and it's just like any other day that's ever been...