Your decision will depend in part on whether you plan to keep your existing wheels and the dimensions of those wheels. Many of the kits require 15" rims and even then many will not guarantee that the wheels will clear the calipers. If the interference is very slight, minor grinding might take care of it.
Ask the prospective vendors first.
The kit from Inline Tube fits 14 x 6 Rally IIs.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching