17's on a 1962 Valiant Wagon

The 13" kiddy-kar wheels are almost equally dumb (I say "almost" because they're the only ones that take most of the pre-'70 original A-body wheelcovers, durnit).

Fortunately it's not a choice between two kinds of dumb; there are many other options (such as this one).

Another thing to keep in mind: the idler arm mount on the early A-bodies is kinda weak and willowy. Adequate for 13" or 14" wheels, but start putting giant wheels and tires on and you're throwing much more load on that arm/mount than it was designed for. The same applies to the rest of the steering linkage -- tie rods and ends, ball joints, etc. The linkage and ball joints are easy enough to beef up with off-the-shelf parts; the idler arm mount requires custom fabrication to beef up.