modernizing?

[Rodzilla]

so soon on it's way to me i have a new project radio...

a 1948-49 Bendix 75P6U AM/FM...i'm not sure how well these perform but i like the look ...the radio is claimed to be working,but original and untouched,working or not i plan to do a bit of a rebuild...it's my first tube radio rebuild project.

i got to looking at the schematics over at www.nostalgiaair.org .caps will be dealt with,the selenium rectifier will get replaced with silicon,and it looks like there is already a dropping resistor after it that may need to be upped a bit in value to compensate for the higher voltages...but i notice that the heater string is upstream and seperate...adding up the heater voltages gets me to 117v...exactly what the set is rated at,but my household voltage in 2010 is 125V...being that a few extra volts on the heater string could be enough to potentially run the heaters at or above thier max ratings i'm wondering...should i also go to the trouble to add a dropping resistor to the front of the heater string to bring this back into line as well? am i misunderstanding some basic concept on how this works or am i just being overcautious?