The 520 is one of my favorites. My father used 400 series because the motors were cheap to overhaul compared to the larger blocks. But I always dreamed of having one of those extended hoods. By the time I had a few bucks to buy a truck in 1964, the V8 had become boss. But I finally fond a 520 farm truck and made it into a tractor 60 years after I dreamed about one.
I take time to show anyone my junk yard that comes to Fredericksburg and wants to see it. If you bring your wife, bring lotsa money. There are lotsa pretties here that ladies love to buy.