Shimano GRX parts compatibility with XT or XTR FD on Salsa Fargo. (BSA73) I am building a bike on Salsa Fargo TI 2019 frameset (ordered). It has BSA73 bottom bracket.

My current plan for the 2x11 drivetrain looks like this:

Crankset: Race Face Turbine 26/36 (Boost)
Bottom bracket - Chris King ThreadFit 30 + Chris King Fit Kit #21 (Wide)

148 BOOST rear wheel (DT350)

ST-RX810-R - SHIMANO GRX Hydraulic Disc Brake DUAL CONTROL LEVER 11-speed

ST-RX810-L - SHIMANO GRX Hydraulic Disc Brake DUAL CONTROL LEVER 2x11-speed

RD-RX812 - SHIMANO GRX Rear Derailleur 11-speed (42T max low sprocket)

CS-M8000 - SHIMANO DEORE XT 11-Speed MTB Cassette Sprocket 11-42

Problem Solvers for the Boost crankset - Salsa FS1328 [thanks thl33ter]


Salsa has Fargo Tiagra frameset with the same size front chainrings that paired with Deore FD driven by Tiagra 4700 levers.

I'm not sure if I can mount Shimano XT or XTR Front derailleur here; and will it be compatible with GRX lever and rear derailleur? What possible model should I choose to mount it on the frame properly (is it DirectMount)? 
The brand does not matter, it can be SRAM or other compatible. But the part quality is quite important (something like XT and up for Shimano)

Added this a little blurry picture I found on mtbr. Hope this will help.
The Salsa website states for the 148mm rear spacing you need one of these adapters to mount a direct mount front derailleur Problem Solvers FS1328

Source: Salsa Fargo 2019 Spec

I don't think you'll have any problems with those shifters and front mech.