Marvel-Shebler and fuel pump overhaul

normally when you overhaul an engine, you should do all the other items to make the engine run as well, however, the fuel pump is not needed to run the engine, it is a transfer pump. I am not aware of anyone overhauling them, and new ones are stupid expensive, esp since it is a pump from a Studebaker.

My engine rebuilder is indicating that Key components, Starter, Generator, magneto's fuel pump and the replacement Marvel-Shebler carburetor need to be refreshed consistent with the engine rebuild.
Starter will be new, Generator refreshed, along with mag's, and ideally a refreshed fuel pump.
It appears new slick mag's beat's refreshing the old mag's. Fuel pump is an open item.
Comments welcome

you can only install the carbs listed on the TCDS for the engine, as for the pump, if it is working and shows no wear, why mess with it ?

rgl.faa.gov/Regulatory_and_Guidance_Libr...E-233%20rev%2019.pdf

I have just had my 415C C-85 overhauled.  I want to replace my Stromberg with a Marvel-Shebler with mixture control.  Plus I want my fuel pump overhauled rather than buy new.
Which Marvel-Shebler model have you guys used plus what's your level of satisfaction.
As for the fuel pump.. mine is showing no wear and what is your experience in having them overhauled.  Buying a new one seems excessive.  Are they typically overhauled by carburetor maintenance facilities?
Thanks PBG