[freebeard]

https://en.wikipedia.org/wiki/Chrysler_A57_multibank

A total of 109 Lees and 7,499 Shermans were fitted with the A57. The M4A4 was largely supplied to the British, the US preferring the M4A3 with the more conventional Ford GAA V8 engine, and restricting their M4A4s to overseas use.[5]

Why has no one put one of these in a rat rod?

https://en.wikipedia.org/wiki/Ford_GAA_engine

The Ford GAA engine is an American all-aluminum 32-valve DOHC 60-degree V8 engine engineered and produced by the Ford Motor Company just before, and during, World War II. It features twin Stromberg NA-Y5-G carburetors, dual magnetos and twin spark plugs making up a full dual ignition system, and crossflow induction. It displaces 1,100 cu in (18 l) and puts out well over 1,000 pound-feet (1,400 N⋅m) of torque from idle to 2,200 rpm. The factory-rated output was 500 hp (370 kW) at 2,600 rpm.