Sounds like a nice, fairly stock truck.

I have an air cleaner from a 1962 C10 that had the 1 bbl carb on it. Not sure if it will work or not, but it is stock and has a 2 1/2" throat and takes an 11 1/2" filter. It has a bit of rust on it and would need to be stripped and painted, but I would be willing to let it go cheap if you are interested.