I use to build Rolls Royce Griffons for Unlimited Hydroplanes. Had my hands on the development (for an Unlimited team) for their 2500 cid Packard program. I love the sound an old V12 sounds at full song. I have P-51's, Bf109, P-47's and many other cool airplanes fly right over me all the time. Did any of you see in that website about the XP-47 that went 505/mph at altitude making it the fastest fighter of WWII? And some of those massive early X-24 series engines, some nearly 6,000 cid?
A brother in law sent me a training manual for the 2500 Packard in the Higgins Torpedo boats. (They had three of them). Cool reading material.