Evanaction forks are entirely different than the rat trap springer front forks used on Murray Ohio products in the 1960?s. A Murray fork would be incorrect on an Evans. It might work, but it was designed for a middleweight and even if are able to run a balloon wheel in it, there would probably not be enough room for the fender.
There are two different forks that were produced by Evans as the Evanaction. In 1954 and 1955 Evans used a version of the old (prewar and postwar) Colson Cushioner fork that they had inherited. This version appears to be the same fork as the Colson unit with the exception that the Evans version has decorative covers over the front cushion discs. Evans dropped this fork and replaced it with their own design in 1956 or 1957. This fork was also called the Evanaction, but is completely different in design and principle. This is the fork that has an airplane like casting mounted on the trussrods and a metal shroud over the springer workings
The first version with the decorative covers is very hard to find. If you are looking for this version you could probably substitute a Colson Cushioner fork until you find the exact fork you are looking for. The Colson Cushioner and the second version of the Evanaction fork are both uncommon but they do turn up on eBay occasionally.
Phil
