Upgrade for '70 Swinger 340 rear

Last I looked, there are a total of two performance 14" tires in the summit catalog. The switch to a 15" wheel is a no-brainer, imo.

But, for what it's worth.....
M&H shows a 235/60x14 muscle car drag tire (their name) bias wrinkle wall treaded dot tire, and....
Hoosier quick time pro, 26x9.5-14LT, really full bias slicks, with a few grooves
and a dot (the LT light truck part of the designation)
The Hoosier has even less tread than the M&H.
Do yourself a favor, get you some 15s.