Stew -- that was my first reaction as well! I was all ready to talk eddie rickenbacher, se-5s and neuports
fecmech -- they had 3350s though as I said before I don't remember the dash number or if they were turbo-compounded or not -- a long time ago --
I believe there was only one navy single engine aircraft that used a 4360 but I can no longer recall its name. I do not think there was more than a couple produced. The one I saw was on the ramp in millington tn about 1953 and was non-op. It was quite large though, made the ad look a bit small by comparison.