Tire size for Midget?

I'm wondering what the appropriate replacement tire size is for a 1970 Midget 
with wire wheels.  I have a couple of old manuals that list 145SR/13, and the 
car now has 155SR/13 on it.  After some internet searching I found suggestions 
that 175/70R-13 would be too wide.

Searching online tirestores I find a reasonable selection of 175/70R-13, and 
only a few models in 155/80R-13 and 165/70R-13.  I'm guessing that the 155's 
would be my best bet.