The wiring guide prescribes either the 372 or 370x with no correction to the PSU, so I would imagine you would probably be fine. However, if you are looking to modify the PSU resistor values to accommodate the power transformer, you can simply do some good ol' Ohm's law as you know the target voltage drop per resistor based off of the UA176 schematic to calculate amperage then use that and plug in the voltage based on the 370x (370x voltage from the GZ34 minus the target voltage).
Thanks!
Paul
Thank you paul
I think I will use the 370bx
I will do my math and see

edit.
the 370bx deliver 2x275v instead of 2X325v
on the schematic going from ac to dc with GZ34+Choke 10HY add 40v
maybe with the 370bx it will add also 40v or maybe less like 35v
so 275+35v=310v
310V is the voltage needed after the first dropping 1,5k resistor (R44).
too much resistance is going to reduce the voltage on the 12BH7 plate.
so do I need to remove completely the first resistor?
put only 300ohm or something and lower the second resistor (R43)?