[Mondial]

Yes, that transformer would be much better but you would want to use it reversed so it will have a stepdown ratio.

Connect the full secondary winding to the 30 tube plate circuit and connect the 19 tube grids to the tapped primary and you will be pretty close to the original.

Using the resistor load and coupling cap in place of the open primary will work to some extent but not very well as the driver stage needs to supply significant audio power to the 19 grids. You are much better off with the replacement transformer.