[MrFixr55]

My $0.02 worth:
+1 on what others said.  I do worry about the extra 3A oops, 1A (Thx Gary SP) filament current on the 5Z3.  5Z3 is the 4 pin version of a 5U4.
Go back to the 80 and limit the input filter cap to 20uF.  This set does have some power, having the Push Pull 42s (They do have drivers after the cathodyne phase inverter).  The Philco manual for this set describes the Audio section as a "degenerative Push-Pull Output stave with drivers.  Rated power is 5 Watts.  Tis should be within the capabilities of the Type 80 Rectifier.
This set merges old and newer style tubes (Loctals are newer than the octals that are not in this radio).  Maybe someone mad the changes to the power supply to give the radio more 'punch'?

If you go with the 80, try to find the newer style that looks like a 4 pin 5Y3.  That is the latest version.  Seems to me that the last 80s that RCA sold looked like 5Y3s only having the 4D base.  Specs for the 80 and 5Y3 are the same but the newer versions are more rugged.