A few things have been experienced by some Model A owners since this post first appeared several years ago.
Just one (1) very recent Model A Tire/Tube experience and humble opinion:
If one ever removes one "bias" tires and installs Coker "Radial" tires with Coker "Radial" tubes, with the shorter metal stems vulcanized in the tubes and pre-tested for "no-leaks" by Coker, with four (4) ounces of Dyna-Beads provided in each tube, the experience will be about like comparing the driving an un-restored Model A out of a junk yard ....... and next jumping into and driving a brand new 2017 SUV.
When driving a Model A on today's highways .... with today's drivers .... for ease of handling, much more tire rubber in contact with the pavement, smooth rides, and most importantly "Life Safety" for family members ...... I will never, ever buy any brand of cheaper Model A "bias" tires and tubes after experiencing this type of Model A tire comparison.